“When animals are killed in a slaughterhouse, six people connected with the killing are responsible for the murder. The person who gives permission for the killing, the person who kills, the person who helps, the person who purchases the meat, the person who cooks the flesh and the person who eats it, all become entangled in the killing. Narada Muni wanted to draw the King's attention to this fact. Thus animal-killing is not encouraged even in a sacrifice.” (Shrila Prabhupada, Shrimad Bhagavatam, 4.25.8 Purport)