Suppose a man as evil as Devadatta slandered, physically beat and envied Śākyamuni Buddha, committing all three kinds of acts—physical, verbal, and mental—against the Buddha for as long as one medium kalpa (20 times the length of a kalpa). How serious is the sin committed by this man? This earth is 168,000 yojana in depth, and it supports all the water of the four great oceans, earth, and rocks of nine mountains, numerous trees and plants, and all creatures on top without dropping, tilting or breaking them. On the contrary, Devadatta’s body being five feet tall or so fell into hell breaking through the earth because he committed the Three Rebellious Sins. The hole he fell through still exists today in India. Tripiṭaka Master Hsüan-chuang writes in his Record of the Western Regions that he saw the hole of Devadatta in India while making a pilgrimage from China to India.

However, it is preached in the “Teacher of the Dharma” chapter of the Lotus Sūtra that the sin of slandering a practicer of the Lotus Sūtra in the Latter Age of Degeneration on a mere whim, without any trace of animosity or envy, is more serious than the sin of Devadatta committing the three kinds of acts—verbal, physical, and mental—against the Buddha for as long as a medium kalpa. How much more so then is the sin of people today who, like Devadatta commit the three kinds of evil acts (verbal, physical, and mental) against a practicer of the Lotus Sūtra, by speaking ill of him, censuring him, envying and physically beating him, and trying to kill him for many years!

Hōren-shō, Letter to Hōren, Writings of Nichiren Shōnin, Volume 6, Followers I, Page 44-45