1.
The Discourse on the Faculties
151.
"There are, monks, these four faculties.
What are the four?
The faith faculty, the energy faculty, the mindfulness faculty, the concentration faculty -
these, monks, are the four faculties."
The first.
Indriya Sutta [AN 4.151, PTS 2.141]
Also known as: Indriyasuttaṃ