Bhagavad Gita 14.9

सत्त्वं सुखे सञ्जयति रजः कर्मणि भारत।ज्ञानमावृत्य तु तमः प्रमादे सञ्जयत्युत॥

sattvaṃ sukhe sañjayati rajaḥ karmaṇi bhārata |jñānamāvṛtya tu tamaḥ pramāde sañjayatyuta ||

Sattva attaches to happiness, Rajas to action, O Arjuna, while Tamas, verily shrouding knowledge, attaches to heedlessness.

Purity brings happiness, passion brings commotion, and ignorance, which obscures wisdom, leads to a life of failure.

Our plain-language meaning of this verse is waiting for scholar review.