Javanahaṁsajātaka

Suttapiṭaka · Khuddakanikāya · Jātaka (1) · Vol. 27 · Section 1756

[1756] Easy to understand is the cry of jackals and of birds; but the cry of humans, O king, is harder to understand than that.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 2 other places