瑜伽師地論略纂 8.191

8.191

論釋尋思理中，釋法爾道理云「成立法性、難思法性、安住法性」等者，如所作性故，還成立聲無常，此為成立法性。如業、藥草、呪術，是難思法性。謂法爾種子三乘差別性，名安住法性。

Where the treatise explains the reasoning of discursive inquiry, in explaining the reasoning of intrinsic nature (dharmatā-yukti) as “the nature of things established, the nature of things difficult to conceive, and the nature of things abiding,” and so forth: like established non-eternality of sound through its being produced, this is the nature of things established. Like karma, medicinal herbs, and spells, these are the nature of things difficult to conceive. The differentiated nature of the three vehicles of naturally inherent seeds is called the nature of things abiding.