金光明經文句記 4.66

4.66

二、「且舉」下，引三經，三：初、引《阿含》，二。初、正引。前佛而去者，七日前入滅也。均頭沙彌，是身子弟子。

Second, from 'moreover, citing' downward, he cites three sūtras, in three parts: first, citing an Āgama, in two parts: first, directly citing. 'Passing away before the Buddha' means entering parinirvāṇa seven days earlier. The novice Cunda was a disciple of Śāriputra.