Exodus 23:20

16And the feast of harvest, the firstfruits of thy labours, which thou hast sown in the field: and the feast of ingathering, which is in the end of the year, when thou hast gathered in thy labours out of the field.

17Three times in the year all thy males shall appear before the Lord God.

18Thou shalt not offer the blood of my sacrifice with leavened bread; neither shall the fat of my sacrifice remain until the morning.

19The 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.

20Behold, I send an Angel before thee, to keep thee in the way, and to bring thee into the place which I have prepared.

21Beware of him, and obey his voice, provoke him not; for he will not pardon your transgressions: for my name is in him.

22But 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.

23For mine Angel shall go before thee, and bring thee in unto the Amorites, and the Hittites, and the Perizzites, and the Canaanites, the Hivites, and the Jebusites: and I will cut them off.

24Thou shalt not bow down to their gods, nor serve them, nor do after their works: but thou shalt utterly overthrow them, and quite break down their images.