2.
The Discourse on the Life Faculty
492.
"There are, monks, these three faculties.
What three?
The femininity faculty, the masculinity faculty, the life faculty -
these, monks, are the three faculties."
The second.
Jīvitindriya Sutta [SN 48.22, PTS 5.204]
Also known as: Jīvitindriyasuttaṃ