17Forsothe thou schalt not make the firste gendrid of oxe, and of scheep, and of goet, to be ayen bouyt, for tho ben halewid to the Lord; oneli thou schalt schede the blood of tho on the auter, and thou schalt brenne the ynnere fatnesse in to swettist odour to the Lord.
Numbers 18
Numbers 18:17