Exodus 23:17

¹⁵Take heed to keep the feast of unleavened bread: seven days ye shall eat unleavened bread, as I charged thee at the season of the month of new corn, for in it thou camest out of Egypt: thou shalt not appear before me empty.

¹⁶And thou shalt keep the feast of the harvest of firstfruits of thy labors, whatsoever thou shalt have sown in thy field, and the feast of completion at the end of the year in the gathering in of thy fruits out of thy field.

— Exodus 23:17 —

¹⁸For when I shall have cast out the nations from before thee, and shall have widened thy borders, thou shalt not offer the blood of my sacrifice with leaven, neither must the fat of my feast abide till the morning.

¹⁹Thou shalt bring the first offerings of the firstfruits of thy land into the house of the Lord thy God. Thou shalt not seethe a lamb in its mother’s milk.