俱舍論記 3.74

3.74

「有言無別至名為命行」者，答中有三：初解無別，壽釋命故。第二師解：先世業果名壽行，現在布施業果名命行。第三師解：由此命根，令眾同分一期住為壽行。由此命根，令眾同分暫時延住名為命行。

"Some say there is no distinction [...] is called formations of vitality": there are three explanations in the answer. The first explanation states there is no distinction, because lifespan explains life. The second master explains: The fruition of past karma is called formations of lifespan; the fruition of present giving karma is called formations of vitality. The third master explains: Due to this life-faculty, causing the generic similarity of beings to abide for a full lifespan is the formations of lifespan; due to this life-faculty, causing the generic similarity of beings to abide temporarily prolonged is called the formations of vitality.