摩訶止觀 7.88

7.88

若睡障道罪起，即用念佛觀治之。緣於應佛無相之相，緣相分明，破障道罪，見十方佛，與理觀相應，開涅槃門。

If the obstacle of sleep and offenses hindering the path arise, one uses the contemplation of recollection of the Buddha (buddhānusmṛti) as the remedy. Conditioning the markless marks of the response-Buddha, with the conditioned marks distinct and clear, one breaks the sins that hinder the path, sees the Buddhas of the ten directions, accords with noumenal contemplation, and opens the door of nirvāṇa.