菩薩戒本疏 2.128

2.128

若佛子，應如法次第坐，先受戒者在前坐，後受戒者在後坐。不問老少，比丘、比丘尼、貴人、國王、王子，乃至黃門奴婢，皆應先受戒者在前坐，後受戒者次第而坐。莫如外道癡人，若老若少，無前無後，坐無次第，如兵奴之法。我佛法中，先者先坐，後者後坐。而菩薩不次第坐者，犯輕垢罪。

If one is a disciple of the Buddha, one should sit in proper order according to the Dharma: those who received the precepts earlier sit in front, and those who received the precepts later sit behind. Regardless of age, whether bhikṣus, bhikṣuṇīs, nobles, kings, princes, or even paṇḍakas and male or female slaves, in all cases those who received the precepts earlier must sit in front, and those who received the precepts later must sit in sequence. One must not be like the foolish people of non-Buddhist traditions, who, whether old or young, have no front or back and sit without order, like the custom of soldiers and slaves. Within my Buddha-Dharma, those who are senior sit first, and those who are junior sit later. If a bodhisattva does not sit in proper order, they commit a duṣkṛta offense.