Bhagavad Gita · 14.6

तत्र सत्त्वं निर्मलत्वात्प्रकाशकमनामयम्।सुखसङ्गेन बध्नाति ज्ञानसङ्गेन चानघ॥

tatra sattvaṁ nirmalatvāt prakāśhakam anāmayam sukha-saṅgena badhnāti jñāna-saṅgena chānagha

Among these, sattva, being pure, is illuminating and free from disease. It binds the soul through attachment to happiness and attachment to knowledge, O sinless one.

— Bhagavad Gita 14.6

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)