With the Divinity Tudu (Tudubrahmasutta)
First published: April 29, 2026
What you learn
This sutta teaches the grave karmic consequences of slandering or harboring ill-will toward noble beings, particularly arahants. The core teaching is delivered through verses spoken by the brahmā Tudu, who warns the monk Kokālika about the danger of speech and mind directed against accomplished disciples like Sāriputta and Moggallāna. The verses establish several key principles: that harmful speech is like an axe that wounds the speaker himself; that praising the blameworthy or blaming the praiseworthy creates destructive karma; and most significantly, that directing hatred toward enlightened beings (the 'well-gone ones') results in extraordinarily long periods in hell—specifically 100,000 nirabbudas plus 36 abbudas plus 5 additional periods. The sutta also contains an important sub-teaching about spiritual attainment and conduct: even Tudu, declared a non-returner (anāgāmī), is shown to have 'transgressed' by returning to the sense-sphere realm, suggesting that attainments can be unstable or that even advanced beings must be careful about their actions. The discourse demonstrates the Buddhist principle that karma operates with particular intensity when the object of one's actions is a field of exceptional merit or purity. Just as giving to noble ones generates great merit, harming them through speech or mind generates proportionally severe negative consequences. The teaching emphasizes that this karmic danger far exceeds ordinary forms of bad luck, such as losing wealth through gambling. The sutta serves as a stern warning about the power of speech and the importance of maintaining faith and respect toward accomplished practitioners, even when one might have doubts or criticisms.
Where it sits
This discourse belongs to the Saṃyutta Nikāya (Connected Discourses), specifically within the Brahmā-saṃyutta (SN6), which collects suttas dealing with brahmās and their interactions with the Buddha and his disciples. The Brahmā-saṃyutta contains discourses showing brahmās paying homage to the Buddha, receiving teachings, or—as in this case—attempting to offer guidance themselves. This sutta is closely related to SN6.10 (Kokālika Sutta), which continues the story of Kokālika's slander of Sāriputta and Moggallāna and describes his subsequent rebirth in the Paduma hell. The Kokālika story also appears in the Sutta Nipāta (Snp 3.10) with additional details and verses. The theme of the grave consequences of slandering arahants connects this sutta to other discourses warning about wrong speech and actions toward noble ones, such as the Devadatta materials found throughout the canon. Within the broader canonical context, this sutta exemplifies the Buddha's teaching on kamma and its results (kamma-vipāka), particularly the principle that the moral weight of an action depends partly on the qualities of the recipient. The astronomical numbers given for hell-time (nirabbudas and abbudas) appear in several suttas dealing with extreme karmic consequences, emphasizing the Buddha's teaching that certain unwholesome actions have consequences extending far beyond a single lifetime. The sutta also relates to teachings on the four bases of success in spiritual practice, one of which is faith (saddhā), here violated by Kokālika's refusal to have confidence in accomplished disciples.
Suggested use
This sutta is particularly relevant for practitioners struggling with doubt, criticism, or negative feelings toward teachers, senior practitioners, or those recognized as accomplished in the Dhamma. When you find yourself inclined to speak critically of respected Buddhist figures or to harbor resentment toward those with greater attainments, this discourse serves as a powerful reminder to exercise restraint and examine your motivations. It's especially useful during times of spiritual crisis when faith wavers or when personality conflicts arise within a sangha community. The teaching can help practitioners recognize that their critical speech or thoughts may harm themselves far more than their intended targets. Practitioners might also turn to this sutta when reflecting on right speech (sammā-vācā) and the karmic weight of words. It provides motivation for developing careful, measured speech and for cultivating the wisdom to discern when criticism is appropriate versus when it arises from unwholesome mental states like jealousy, pride, or aversion. The sutta can be particularly valuable for those in teaching or leadership roles who must sometimes evaluate others' practice, reminding them to do so with humility and awareness of their own limitations in judging others' attainments. Finally, the verses themselves serve as memorable contemplations on the self-destructive nature of harmful speech, suitable for memorization and recollection when one feels the impulse to speak unskillfully.
Guidance
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- Speech as a self-inflicting weapon: The sutta teaches that harmful speech is like an axe born in one's own mouth, with which fools cut themselves. Every word of slander or false accusation creates immediate karmic consequences for the speaker, not just the target.
- The gravity of slandering the virtuous: Praising the blameworthy or blaming the praiseworthy accumulates "bad luck" (dukkha) through one's own mouth. This isn't arbitrary punishment but the natural consequence of setting oneself against reality and virtue.
- Comparative severity of wrongdoing: The Buddha emphasizes that speaking against noble ones (ariyas) is far worse than losing all one's wealth at gambling or even losing everything including oneself. This highlights how spiritual harm outweighs material loss.
- Even celestial beings can transgress: Brahmā Tudu, despite his elevated status and attainment as a non-returner, is shown to have transgressed by returning to the human realm. This demonstrates that attainment doesn't guarantee perfect behavior and that even advanced beings must be mindful of their actions.
- "This is about protecting religious authority": This misses the point entirely. The teaching isn't about protecting the feelings or status of monks, but about the karmic consequences of setting one's mind against genuine virtue. Kokālika's slander of Sāriputta and Moggallāna (truly accomplished practitioners) creates immense suffering for himself because he's actively opposing what is wholesome and true. The issue is the relationship between one's speech, intention, and reality—not institutional protection.
- "Bad luck is random or superstitious": The Pali term translated as "bad luck" (kalī) refers to the worst throw in dice, but here represents karmic consequence, not chance. The sutta explicitly states one "gathers" this through one's mouth—it's accumulated through intentional action. This is cause-and-effect, not supernatural punishment or random misfortune.
- "This only applies to criticizing enlightened beings": While the sutta specifically addresses reviling noble ones, the principle extends to all false or malicious speech. The severity increases with the virtue of the target, but the fundamental teaching is that harmful speech always rebounds on the speaker. The extreme example serves to illustrate the universal principle.
- Pause before criticizing: Before speaking critically of anyone, especially those with good reputations, examine your actual knowledge and motivation. Ask yourself: "Do I have direct evidence of wrongdoing, or am I repeating rumors? Am I speaking from jealousy, resentment, or genuine concern?" If you cannot verify your criticism or detect unwholesome motivation, remain silent. This isn't about never addressing genuine problems, but about not weaponizing speech carelessly.
- Recognize speech as immediate karma: Cultivate awareness that each word creates consequences in your own mind first. Notice how speaking harshly leaves a residue of agitation, while speaking truthfully and kindly creates ease. Practice feeling the "axe in your mouth" as a physical sensation—tension in the jaw, heat in the face, constriction in the throat—before harmful words emerge. This bodily awareness can interrupt the pattern.
- Verify before you amplify: In our age of social media and instant communication, apply this teaching by refusing to share accusations or criticisms without verification. When you see posts attacking others' character, pause. Ask: "Do I know this to be true? What is my intention in sharing this?" The sutta's extreme time periods in hell (100,000+ eons) emphasize that casual slander has non-casual consequences. Let this inform your relationship with "share" and "retweet" buttons.
- SN6.10 (Kokālika Sutta): The direct continuation of this story, where Kokālika refuses Brahmā Tudu's advice and dies, being reborn in the Paduma hell for slandering Sāriputta and Moggallāna. This shows the actual fruition of the karma warned about in SN6.9.
- MN21 (Kakacūpama Sutta - The Simile of the Saw): Provides the complementary teaching on how to receive criticism and abuse without retaliating. While SN6.9 warns against harmful speech, MN21 teaches how to maintain loving-kindness even when others are "sawing you limb from limb with a two-handled saw."
- AN10.176 (Cunda Sutta): Addresses the proper way to evaluate and criticize monastics, distinguishing between skillful correction and harmful slander. This provides practical guidance for navigating the tension between accountability and the warnings in SN6.9 about reviling practitioners.