Bhagavad Gita 3.41

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.

तस्मात्त्वमिन्द्रियाण्यादौ नियम्य भरतर्षभ।
पाप्मानं प्रजहि ह्येनं ज्ञानविज्ञाननाशनम्॥

tasmāttvamindriyāṇyādau niyamya bharatarṣabha|
pāpmānaṃ prajahi hyenaṃ jñānavijñānanāśanam||

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