Mahāsutasomajātaka

Suttapiṭaka · Khuddakanikāya · Jātaka (2) · Vol. 28 · Section 340

[340] The agreement that I made with the brahmin while I stood in sovereignty over my own realm — having fulfilled that agreement to the brahmin, I, guarding truth, shall come back again.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 1 other place

Vol. 28 · Section 350 — Mahāsutasomajātaka