Sanskrit

तस्मात्त्वमिन्द्रियाण्यादौ नियम्य भरतर्षभ। पाप्मानं प्रजहि ह्येनं ज्ञानविज्ञाननाशनम्।।3.41।।

Summary

Therefore, O Arjuna, first control your senses and then slay desire, for it is full of sin and is the destroyer of knowledge and wisdom.