Leviticus 6:18-20

American Standard Version

¹⁸ Every male among the children of Aaron shall eat of it, as his portion for ever throughout your generations, from the offerings of Jehovah made by fire: whosoever toucheth them shall be holy.

¹⁹ And Jehovah spake unto Moses, saying, ²⁰ This is the oblation of Aaron and of his sons, which they shall offer unto Jehovah in the day when he is anointed: the tenth part of an ephah of fine flour for a meal-offering perpetually, half of it in the morning, and half thereof in the evening.