Exodus 23:18-22

Thou shalt not offer the blood of my sacrifice with leavened bread; neither shall the fat of my sacrifice remain until the morning.

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.

Behold, I send an Angel before thee, to keep thee in the way, and to bring thee into the place which I have prepared.

Beware of him, and obey his voice, provoke him not; for he will not pardon your transgressions: for my name is in him.

But if thou shalt indeed obey his voice, and do all that I speak; then I will be an enemy unto thine enemies, and an adversary unto thine adversaries.