Bhagavad Gita 14.6

O Sinless One! Of these, purity, being luminous, strong, and invulnerable, binds one with its yearning for happiness and illumination.

तत्र सत्त्वं निर्मलत्वात्प्रकाशकमनामयम्।सुखसङ्गेन बध्नाति ज्ञानसङ्गेन चानघ॥

tatra sattvaṃ nirmalatvātprakāśakamanāmayam|sukhasaṅgena badhnāti jñānasaṅgena cānagha||

English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).