Bhagavad Gita Chapter 03, Text 36

Bg 3.36

arjuna uvaca
atha kena prayukto ’yam
papam carati purusah
anicchann api varsneya
balad iva niyojitah

Word for word: 
arjunah uvaca — Arjuna said; atha — then; kena — by what; prayuktah — impelled; ayam — one; papam — sins; carati — does; purusah — a man; anicchan — without desiring; api — although; varsneya — O descendant of Vrsni; balat — by force; iva — as if; niyojitah — engaged.

Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Arjuna said: O descendant of Vrsni, by what is one impelled to sinful acts, even unwillingly, as if engaged by force?

Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
A living entity, as part and parcel of the Supreme, is originally spiritual, pure, and free from all material contaminations. Therefore, by nature he is not subject to the sins of the material world. But when he is in contact with the material nature, he acts in many sinful ways without hesitation, and sometimes even against his will. As such, Arjuna’s question to Krishna is very sanguine, as to the perverted nature of the living entities. Although the living entity sometimes does not want to act in sin, he is still forced to act. Sinful actions are not, however, impelled by the Supersoul within, but are due to another cause, as the Lord explains in the next verse.