Bhagavad
Gita Chapter 18.39
yad agre cānubandhe ca
sukhaḿ mohanam ātmanaḥ
nidrālasya-pramādotthaḿ
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.