Chapter 18 · verse 29 · gita.yoga.org
Bhagavad Gita 18.29
बुद्धेर्भेदं धृतेश्चैव गुणतस्त्रिविधं शृणु।प्रोच्यमानमशेषेण पृथक्त्वेन धनञ्जय
Hear thou the threefold division of intellect and firmness, according to the Gunas, as I declare them fully and distinctly, O Arjuna.