mokṣasaṃnyāsayoga - Verse śloka 35
śloka 35
yayā svapnaṃ bhayaṃ śokaṃ viṣādaṃ madameva ca |
na vimuñcati durmedhā dhṛtiḥ sā pārtha tāmasī ||18-35||
Translation
O Partha! That fortitude by which a person of weak intellect does not abandon sleep, fear, grief, dejection and intoxication—that fortitude is Tamasic.