四明尊者教行錄 2.44

2.44

疏云：用即為三，一事、二行、三理。事者，虎狼刀劍等也。行者，五住煩惱也。理者，法界無礙無染而染，即理性之毒也。

The commentary states: "Functions are of three kinds: first, concrete phenomena; second, practice; third, principle. Concrete phenomena refers to tigers, wolves, swords, knives, and the like. Practice refers to the afflictions of the five entrenchments. Principle refers to the dharmadhātu being unobstructed and undefiled yet becoming defiled—that is, the poison of the nature of principle."