Bhagavad Gita 14.8

तमस्त्वज्ञानजं विद् मोहनधिं सर्वदेहिनाम् |
प्रमादालस्यनिद्राभिस्तनिब्ध्नति भारत

Translation

O Arjun, tamo guṇa, which is born of ignorance, is the cause of illusion for the embodied souls. It deludes all living beings through negligence, laziness, and sleep.