Suddhikasutta

Suttapiṭaka · Saṁyuttanikāya · Saḷāyatanavaggasaṁyutta · Vol. 18 · Section 445

[445] Bhikkhus, there are these three feelings (vedanā). What are the three? Pleasant feeling, painful feeling, and neither-painful-nor-pleasant feeling. These, bhikkhus, are the three feelings. The tenth.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 2 other places

Vol. 18 · Section 359 — Vedanāsaṅyutta
Vol. 18 · Section 361 — Sukhasutta