Bhagavad Gita Chapter 1.44
aho bata mahat pāpaḿ
kartuḿ vyavasitā vayam
yad rājya-sukha-lobhena
hantuḿ sva-janam udyatāḥ
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.