SB 10.4.40
tasmat sarvatmana rajan
brahmanan brahma-vadinah
tapasvino yajña-silan
gas ca hanmo havir-dughah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
O King, we, who are your adherents in all respects, shall therefore kill the Vedic brahmanas, the persons engaged in offering sacrifices and austerities, and the cows that supply milk, from which clarified butter is obtained for the ingredients of sacrifice.