成唯識論述記 2.74

2.74

述曰：此第三牒本薩婆多毘婆沙師義。如經部師，極微和合所成是假，不能為緣發生五識。今和合時一一極微有和合麁相，各能為緣發生五識，以有實體能為緣故。然別極微相，五識不得，故非之也。

The Commentary states: This is the third part, citing the doctrine of the original Sarvāstivāda Vaibhāṣika masters. As with the Sautrāntika masters, that which is formed by the combination of atoms is nominal, and cannot serve as a condition to produce the five consciousnesses. Now [for the Vaibhāṣika], when combined, each atom has a coarse combined aspect and each can serve as a condition to produce the five consciousnesses, because having a real entity, it can serve as a condition. However, the five consciousnesses do not apprehend the distinct aspects of atoms, hence they are rejected.