Srimad Bhagavatam Canto 10, Chapter 04, Text 40

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.
Srimad Bhagavatam Canto 10, Chapter 04, Text 39
Srimad Bhagavatam Canto 10, Chapter 04, Text 41