Leviticus 22:28-30

American Standard Version

²⁸ And whether it be cow or ewe, ye shall not kill it and its young both in one day. ²⁹ And when ye sacrifice a sacrifice of thanksgiving unto Jehovah, ye shall sacrifice it that ye may be accepted. ³⁰ On the same day it shall be eaten; ye shall leave none of it until the morning: I am Jehovah.