成唯識論述記 5.66

5.66

述曰：前念心王此於後心及心所法，能開避彼路，引導令生，故為此依。此但屬心，非諸心所、色、不相應，皆無力故；亦非無為，無前後故。故復言「等」，此則第一，釋依體、義。

The Commentary states: The sovereign mind (cittarāja) of the preceding moment, with respect to the subsequent mind and mental factors, is capable of clearing a path for them and guiding them to arise; therefore it serves as this basis. This belongs solely to the mind, not to mental factors, form, or non-associated formations, for they are all devoid of such efficacy; nor is it unconditioned dharmas, because they lack prior and posterior. Therefore it says again 'equal'. This is the first part, explaining the essence and meaning of the basis.