Satullapakāyikavagga

Suttapiṭaka · Saṁyuttanikāya · Sagāthāvaggasaṁyutta · Vol. 15 · Section 81

[81] Then another deity (devatā) spoke this verse in the presence of the Blessed One: "One should associate only with the good; with the good one should form intimacy. Having understood the true Dhamma (saddhamma) of the good, one does not sorrow in the midst of sorrow."

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 1 other place

Vol. 15 · Section 279 — Nānātitthiyavagga