Exodus 23:19

Bring the best of the firstfruits of your soil to the house of the Lord your God. You must not cook a young goat in its mother’s milk.
BSB · Berean Standard Bible
The first of the firstfruits of thy land thou shalt bring into the house of the Lord thy God. Thou shalt not seethe a kid in his mother’s milk.
KJV · King James Version
You shall bring the first of the first fruits of your ground into the house of the Lord your God. “You shall not boil a young goat in its mother’s milk.
WEB · World English Bible
The first of the first-fruits of thy ground thou shalt bring into the house of Jehovah thy God. Thou shalt not boil a kid in its mother’s milk.
ASV · American Standard Version

Related passages

From the Treasury of Scripture Knowledge, grouped by the word they explain.

first of the
Exodus 22:29; Exodus 34:26; Leviticus 23:10–17; Numbers 18:12, 13; Deuteronomy 12:5–7; Deuteronomy 26:10; Nehemiah 10:35; 1 Corinthians 15:20; Revelation 14:4
Thou shalt not seethe a kid
The true sense of this passage seems to be that assigned by Dr. Cudworth, from a MS. comment of a Karaïte Jew. "It was a custom with the ancient heathens, when they had gathered in all their fruits, to take a kid, and boil it in the dam's milk; and then in a magical way, to go about and sprinkle all their trees, and fields, and gardens, and orchards with it, thinking by these means, that they should make them fruitful, and bring forth more abundantly in the following year. Wherefore, God forbad his people, the Jews, at the time of their in-gathering, to use any such superstitious or idolatrous rite."
Exodus 34:26; Deuteronomy 14:21; Proverbs 12:10; Jeremiah 10:3