成唯識論述記 7.49

7.49

述曰：身心若安，徐緩為業；身心不安，怱遽為業。俱通思、惠，或思名安，徐而細故，思量性故。惠名不安，急而麁故，簡擇性故，身、心前後有安、不安，皆依尋、伺，故名所依。

The Commentary states: If body and mind are at ease, calm relaxation is their activity; if body and mind are not at ease, hurried haste is their activity. Both pervade volition and wisdom; or volition is called ease because it is relaxed and subtle, having the nature of deliberating; wisdom is called unease because it is hasty and coarse, having the nature of discerning. The presence of ease and unease in body and mind before and after depends entirely upon investigation and evaluation, hence they are called their support.