Mahāhaṁsajātaka

Suttapiṭaka · Khuddakanikāya · Jātaka (2) · Vol. 28 · Section 212

[212] So then, apply yourself to endeavor (yoga) that is fitting, endowed with righteousness (dhamma); by your consummate exertion, carry out the quest for my life.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.