Bhagavad Gita 14.6

तत्र सत्त्वं निर्मलत्वात्प्रकाशकमनामयम् |
सुखसङ्गेन बधनाति ज्ञानसङ्गेन चान्घ

Translation

Amongst these, sattva guṇa, the mode of goodness, being purer than the others, is illuminating and full of well-being. O sinless one, it binds the soul by creating attachment for a sense of happiness and knowledge.