Deuteronomy 27:7 WBT

⁵  And there shalt thou build an altar to the LORD thy God, an altar of stones: thou shalt not lift up [any] iron [tool] upon them.

⁶  Thou shalt build the altar of the LORD thy God of whole stones: and thou shalt offer on it burnt-offerings to the LORD thy God.

⁷  And thou shalt offer peace-offerings, and shalt eat there, and rejoice before the LORD thy God.

⁸  And thou shalt write upon the stones all the words of this law, very plainly.

⁹  And Moses and the priests the Levites spoke to all Israel, saying, Take heed and hearken, O Israel, this day thou art become the people of the LORD thy God.