Bhagavad Gita 1.45 Chapter 1, Verse 45

अहो बत महत्पापं कर्तुं व्यवसिता वयम् ।
यद्राज्यसुखलोभेन हन्तुं स्वजनमुद्यताः ॥१.४५॥

aho bata mahatpāpaṃ kartuṃ vyavasitā vayam
yadrājyasukhalobhena hantuṃ svajanamudyatāḥ

Meaning

Alas, what a great sin we have resolved to commit, ready to kill our own kin out of greed for the pleasures of a kingdom!

Newly written by Bhajan Dhun — scholarly review in progress.

Reference: Bhagavad Gita 1.45 (Chapter 1, Arjuna's Despair (Arjuna Vishada Yoga), Verse 45)