俱舍論記 10.106

10.106

「於壽與煖至定約剎那」者，毘婆沙師釋。如契經中於壽與煖俱時起中有相雜言，例知此經說定約剎那。故《正理》釋云「前約剎那、後約所緣，其理決定。」

Regarding "Regarding vitality and warmth … definitely refers to the moment": the master of the Vibhāṣā explains. Just as in the sūtra, regarding the simultaneous arising of vitality and warmth, there is the word 'blended', by analogy we know that this sūtra definitely refers to the moment. Therefore the Nyāyānusāra explains: 'The former refers to the moment, and the latter refers to the object; this principle is definitive.'