Kuṭidūsakavagga

Suttapiṭaka · Khuddakanikāya · Jātaka (1) · Vol. 27 · Section 584

[584] For one whose mind (citta) is unsettled, whose mind is fickle, who is treacherous, whose character is ever inconstant — a state of happiness is not found.

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.