翻譯名義集 4.116

4.116

[Saṃvara] Here translated as "restraint" (護). This is non-informative volition (avijñapti-cetanā), wholesome volition associated with the sixth consciousness. It is also called non-informative form (avijñapti-rūpa). Because it has the capacity to stop evil and prevent wrong, it is called restraint. Therefore, when the Diamond Subcommentary clarifies the essence of the precepts, singling out their substantial nature, it is precisely this single dharma of non-informative volition.