Saṁyutta Nikāya,
V: Mahā-Vagga
48. Indriya Saṁyutta
III. Chaḷindriya-vaggo
48. Kindred Sayings on the Faculties
III. The Six Faculties
Sutta 22
Jīvita (Jīvit'indriya) Suttaṁ
Vitality1
THUS have I heard:
Once the Exalted One was staying near Sāvatthī.
Then the Exalted One addressed the monks,
saying:
"Monks."
"Yes, lord," replied those monks to the Exalted One.
The Exalted One said:
"Monks, there are these three faculties.
What three?
Femininity,
masculinity
and vitality.
These are the three faculties."
1 Jīvita. Cf. Buddh. Psych. Eth., p. 19. For femininity, ibid., 190-1. I translate here as 'faculties' better to suit the context.