|Chapter 1, Verse 44|

उत्सन्नकुलधर्माणां मनुष्याणां जनार्दन।

नरकेऽनियतं वासो भवतीत्यनुशुश्रुम।।1.44।।

ॐ

Transliteration / Meaning

utsanna-kula-dharmāṇāṁ manuṣhyāṇāṁ janārdana
narake ‘niyataṁ vāso bhavatītyanuśhuśhruma

Translation

Alas, how strange it is that we are preparing to commit greatly sinful acts. Driven by the desire to enjoy royal happiness, we are intent on killing our own kinsmen.

Purport by Srila Prabhupada

Driven by selfish motives, one may be inclined to such sinful acts as the killing of one's own brother, father or mother. There are many such instances in the history of the world. But Arjuna, being a saintly devotee of the Lord, is always conscious of moral principles and therefore takes care to avoid such activities.