法界次第初門 3.152

3.152

八、精進無減。佛身、心二種精進滿足，常度一切，未曾休息，故名精進無減。

Eighth, no decrease in vigor. The Buddha's two kinds of vigor—physical and mental—are fully perfected, and he constantly liberates all beings without ever resting. Hence it is called no decrease in vigor.