This single verse holds two of the most important laws in Jewish life — and the Targum layers them tightly together.
Targum Pseudo-Jonathan on Exodus (Exodus 23:19) says: The first of the choice fruits of thy ground thou shalt bring to the sanctuary of the Lord thy God. My people of the house of Israel, you are not permitted to dress or to eat of flesh and milk mingled together, lest I be greatly displeased; and I prepare you the wheat and the straw together for your food.
The Bikkurim and the Separation of Meat From Milk
First: the firstfruits. The opening yield of your ground must travel up to the sanctuary — a portion given before any is kept. Second: meat and milk may not be cooked together, prepared together, or eaten together.
The Hebrew Bible states this law three separate times — here, and twice more (Exodus 34:26, Deuteronomy 14:21). That triple repetition is the rabbinic basis for three distinct prohibitions: you may not cook them together, eat them together, or derive any benefit from the mixture.
The Targum's Surprising Reason
Notice the warning in the Targum. Lest I be greatly displeased; and I prepare you the wheat and the straw together for your food. The threat is grain and straw mixed in a single meal — a punishment in which you cannot separate what you want from what you reject. Measure for measure: if you mix what should be separate, God will mix your wheat with inedible chaff.
The Takeaway
Kashrut's meat-and-milk boundary begins here. The Torah teaches separation as a daily discipline — a meal-by-meal reminder that some things that seem compatible must be kept apart.