SB 6.11.15
yo no ’grajasyatma-vido dvijater
guror apapasya ca diksitasya
visrabhya khadgena siramsy avrscat
pasor ivakarunah svarga-kamah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Only for the sake of living in the heavenly planets, you killed my elder brother — a self-realized, sinless, qualified brahmana who had been appointed your chief priest. He was your spiritual master, but although you entrusted him with the performance of your sacrifice, you later mercilessly severed his heads from his body the way one butchers an animal.