大般涅槃經集解 16.6

16.6

案僧亮曰：四依晦迹，不可別也。智秀曰：此下第二辨供養之法也。佛將欲說，迦葉發問也。

Sengliang comments: The four reliances conceal their traces and cannot be distinguished. Zhixiu says: Below this is the second, distinguishing the method of making offerings. When the Buddha was about to speak, Kāśyapa raised this question.