俱舍論頌疏論本 18.42

18.42

釋曰：破僧罪大者，提婆達多知法非法，為欲破僧而起虛誑語，為最大罪，由此傷毀佛法身故，障世生天解脫道故。謂僧已破，乃至未和，一切世間入道、得果、離染、漏盡皆悉被遮，習定、溫誦、思等業息，大千世界法輪不轉，天、人、龍等身心擾亂，故招無間一劫異熟。餘四無間，第五次重，第三次重，第一次輕，第二最輕，恩等少故。

Explanation: Regarding 'schism is the greatest crime': Devadatta, knowing what was Dharma and what was non-Dharma, uttered false speech with the desire to cause a schism in the Sangha, which is the greatest sin. This is because it damages and destroys the Buddha's Dharmakāya and obstructs the worldly path to heavenly rebirth and liberation. That is to say, once the Sangha is divided, until it is reconciled, for everyone in the world, entry into the path, attainment of fruits, detachment from defilements, and the destruction of the outpourings are all blocked; practices such as cultivating absorption, reciting texts, and contemplation cease; the wheel of the Dharma does not turn in the trichiliocosm; and the bodies and minds of devas, humans, nāgas, and so forth are thrown into turmoil. Therefore, it incurs a ripening of one eon in the Avīci [hell]. Among the remaining four inexpiables: the fifth is the next heaviest, the third is next, the first is lighter, and the second is the lightest, because [the breach of] gratitude and so forth is less.