Chapter 14 · The Three Qualities · Krishna said
Bhagavad Gita 14.5 — Bondage of the three gunas
सत्त्वं रजस्तम इति गुणाः प्रकृतिसम्भवाः। निबध्नन्ति महाबाहो देहे देहिनमव्ययम् ॥
sattvaṃ rajastama iti guṇāḥ prakṛtisambhavāḥ | nibadhnanti mahābāho dehe dehinamavyayam ||
Meaning
Sattva (goodness), rajas (passion) and tamas (inertia) — these three qualities born of Nature bind the eternal soul to the body.