sāṃkhyayoga - Verse śloka 66
śloka 66
nāsti buddhirayuktasya na cāyuktasya bhāvanā |
na cābhāvayataḥ śāntiraśāntasya kutaḥ sukham ||2-66||
Translation
With the arising of tranquility, all sorrows come to an end, and the intellect of the contented man quickly becomes steady.