Māghasutta

Suttapiṭaka · Saṁyuttanikāya · Sagāthāvaggasaṁyutta · Vol. 15 · Section 225

[225] Standing to one side, Māgha the young deity (devaputta) addressed the Blessed One in verse: "Having slain what does one sleep at ease? Having slain what does one not sorrow? Of what one thing, O Gotama, do you approve the killing?"

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 1 other place

Vol. 15 · Section 198 — Ghatvāvagga