大般涅槃經集解 41.54

41.54

Sengliang comments: This clarifies that this land is foul and evil, and sentient beings are prone to forgetting; therefore it possesses all three kinds of sūtras.
Zhixiu comments: The fourth section directly answers what was asked. It clarifies that the principle of the Dharma of Krakucchanda Buddha is permanently unperishing; it was merely because practitioners had sharp faculties that words were not needed. Because the verbal teaching did not flourish, it is said to have perished.