Deuteronomy 27:6

Of whole stones shalt thou build an altar to the Lord thy God, and thou shalt offer upon it whole-burnt-offerings to the Lord thy God.

Thou shalt build the altar of the Lord thy God of whole stones: and thou shalt offer burnt offerings thereon unto the Lord thy God:

You shall build Yahweh your God’s altar of uncut stones. You shall offer burnt offerings on it to Yahweh your God.