Exodus 34:25

²³  Thrice in the year shall all your men children appear before the LORD God, the God of Israel.

²⁴  For I will cast out the nations before thee, and enlarge thy borders: neither shall any man desire thy land, when thou shalt go up to appear before the LORD thy God thrice in the year.

²⁵  Thou shalt not offer the blood of my sacrifice with leaven; neither shall the sacrifice of the feast of the passover be left unto the morning.

²⁶  The first of the firstfruits of thy land thou shalt bring unto the house of the LORD thy God. Thou shalt not seethe a kid in his mother's milk.

²⁷  And the LORD said unto Moses, Write thou these words: for after the tenor of these words I have made a covenant with thee and with Israel.