成唯識論述記 2.371

2.371

述曰：第四、四相齊興難，有三子段：第一、例體應俱難。量云：汝生用時，住等三用亦應即起；體現有故；猶如生相。住等三法若起用時，生用應起；以現有體故，如住等三用。住等三用比量亦然，彼宗計為前後起故。

The Commentary states: Fourth is the objection that the four marks would function simultaneously, which has three sub-clauses: First, the objection that by analogy with their substances they should be simultaneous. The syllogism is: At the time when your birth functions, the functions of the three such as abiding should also arise immediately; because their substances presently exist; just like the mark of birth. At the time when the three phenomena such as abiding arise their functions, the function of birth should arise; because of possessing present substance; like the three functions such as abiding. The syllogism for the three functions such as abiding is also like this, because that school maintains that they arise sequentially.