瑜伽論記 15.437

15.437

十二、明眼耳鼻識雖依二生而識體唯一。意謂若患一眼識即不明，故知一識，依於二眼。又識非色，無方所引不成三分，此簡犢子、上座等計二眼前後得生一識。

Twelfth, explaining that although the eye, ear, and nose consciousnesses arise based on two [organs], the substance of each consciousness is only single. The meaning is that if one eye is impaired, consciousness is immediately not lucid; therefore we know that a single consciousness relies on two eyes. Furthermore, consciousness is not material and lacks spatial extension; it cannot be divided into three parts. This refutes the Vātsīputrīyas, Sthaviras, and others who hypothesize that two eyes can successively produce a single consciousness.