四分律行事鈔資持記 3.668

3.668

別示中，初文。若據沙彌，亦取受戒前後，分上中下；此約多人初受，排次為言。生年，即俗年長幼。出家年，即入道先後。

In the separate explanations, the first text. If we consider śrāmaṇeras, they also take the earlier or later reception of the precepts to distinguish superior, middling, and inferior; this is spoken regarding the arrangement of rank when many people initially receive them. "Birth years" means youth and age in worldly years. "Years of going forth" means priority in entering the Way.