Leviticus 22:28-30

Amplified Bible, Classic Edition

²⁸ And whether [the mother] is a cow or a ewe, you shall not kill her and her young both in one day.

²⁹ And when you sacrifice an offering of thanksgiving to the Lord, sacrifice it so that you may be accepted.

³⁰ It shall be eaten on the same day; you shall leave none of it until the next day. I am the Lord.