Verse
तमस्त्वज्ञानजं विद्धि मोहनं सर्वदेहिनाम् ।प्रमादालस्यनिद्राभिस् तन्निबध्नाति भारत ॥
tamastvajñānajaṃ viddhi mohanaṃ sarvadehināmpramādālasyanidrābhis tannibadhnāti bhārata
But tamas, know thou, born of ignorance, is the deluder of all embodied beings; it binds by negligence, indolence and sleep, O Bharata.
Gītā 14·8