仁王護國般若波羅蜜多經疏 3.240

3.240

解行名者，忍力能治自他恚恨，名無違逆行，無嗔三業為自性也。心謙下者，種種毀辱逼切惱害，心唯謙下，皆能忍也。從此第四無屈撓行。

Explaining the name of the practice: The power of patience can remedy malice and resentment in oneself and others, so it is called the practice of non-opposition; the three karmas free of hatred are its intrinsic nature. "The mind is humble": in the face of various humiliations, oppressions, and torments, the mind is solely humble, and one is able to endure them all. From here, the fourth is the practice of non-yielding.