大般涅槃經集解 36.35

36.35

案法瑤曰：苟不知足，則唯利是貪、悋而不捨，安能以慈悲救物乎？故宜知足也。寶亮曰：第四於四威儀中必動靜得所，不乖三業而妨道。

Fayao states: If one is not content, one solely covets gain and is stingy without giving; how could one rescue beings with compassion? Therefore, one ought to know contentment. Baoliang states: The fourth means that in the four postures, movement and stillness must find their proper place, not conflicting with the three karmas and obstructing the path.