妙法蓮華經文句 9.22

9.22

問：眠是愚是蓋，此云何通？答：佛起現前欲調身故眠，非蓋非愚眠也。

Question: Sleep is delusion and a hindrance; how is this resolved? Answer: The Buddha gives rise to it manifested before him wishing to regulate the body, hence he sleeps; it is not the sleep of hindrance or delusion.