Bhagavad Gita Chapter 18 Verse 35
भगवद् गीता अध्याय 18 श्लोक 35

यया स्वप्नं भयं शोकं विषादं मदमेव च।
न विमुञ्चति दुर्मेधा धृतिः सा पार्थ तामसी।।18.35।।



English Translation - Swami Sivananda
18.35 That, by which a stupid man does not abandon sleep, fear, grief, despair and also conceit  that firmness, O Arjuna, is Tamasic.


English Translation of Sanskrit Commentary By Sri Shankaracharya's
18.35 That firmness is mata, considered to be; tamasi, born of tamas; yaya, due to which; durmedha, a person with a corrupt intellect; na vimuncati, does not give up-indeed, holds fast to; svapnam, sleep; bhayam, fear; sokam, sorrow; visadam, despondency; eva ca, as also; madam, sensuality, enjoyment of objects-mentally holding these as things that must always be resorted to, considering them to be greatly important to himself, like a drunkard thinking of wine.
The threefold division of action as also of agents according to the differences of the gunas has been stated. After that, now is being stated the threefold division of results and happiness:


Transliteration Bhagavad Gita 18.35Yayaa swapnam bhayam shokam vishaadam madameva cha;
Na vimunchati durmedhaa dhritih saa paartha taamasee.


Word Meanings Bhagavad Gita 18.35yayā—in which; svapnam—dreaming; bhayam—fearing; śhokam—grieving; viṣhādam—despair; madam—conceit; eva—indeed; cha—and; na—not; vimuñchati—give up; durmedhā—unintelligent; dhṛitiḥ—resolve; sā—that; pārtha—Arjun, the son of Pritha; tāmasī—in the mode of ignorance