The entire content of this mail is from Swami Adidevananda's translation of Ramanuja Gita Bhashyam, published by Ramakrishna Mission.
The origin of sin - 36-43
1 Gita Sloka every day - Chapter 3 -Karma Yaoga - Sloka 41
Tasmat tvam indriyani adau niyamya bharata rishabha I
Papmanam prajahi hi enam gyan vigyan nashanam II sloka 41
तस्मात त्वां इन्द्रियाणि आदौ नियम्य भारत ऋषभ ।
पाप्मानं प्रजहि हि एनं ज्ञान विज्ञान नाशनं ।। श्लोक ४१
Therefore, O Arjuna, controlling the senses in the very beginning, slay this sinful thing that destroys both knowledge & discrimination.