Bhagavad-gītā 18.39
BG 18.39
Open the full passageयदग्रे चानुबन्धे च सुखं मोहनमात्मनः । निद्रालस्यप्रमादोत्थं तत्तामसमुदाहृतम् ॥३९॥
Sanskrit
yad agre cānubandhe ca sukhaṁ mohanam ātmanaḥ nidrālasya-pramādotthaṁ tat tāmasam udāhṛtam
Translation
And that happiness which is blind to self-realization, which is delusion from beginning to end and which arises from sleep, laziness and illusion is said to be of the nature of ignorance.