[R]egarding the three rebellious sins committed by Devadatta, although he caused the Buddha to bleed, this Buddha was the Buddha before the Lotus Sūtra was preached and not the Original and True Buddha who attained Enlightenment in the eternal past. He also killed an arhat, but this arhat was the one before the Lotus Sūtra was preached, not the practicer of this sūtra. He disrupted the harmony in a Buddhist order, but it was not the order based on the great sudden and perfect Lotus precepts, but on the Hinayāna precepts before the Lotus Sūtra was preached. As a result, although the earth split open and Devadatta fell into the Hell of Incessant Suffering, because he had not actually committed the three rebellious sins against the Lotus Sūtra, he could therefore still become the Heavenly King Buddha in the Lotus Sūtra.

Ha Ryōkan-tō Gosho, A Letter Refuting Ryōkan-bō and Others, Writings of Nichiren Shōnin, Volume 5, Page 55