Deuteronomy 27:5-8

27:5 Then you must build an altar there to the Lord your God, an altar of stones – do not use an iron tool on them. 27:6 You must build the altar of the Lord your God with whole stones and offer burnt offerings on it to the Lord your God. 27:7 Also you must offer fellowship offerings and eat them there, rejoicing before the Lord your God. 27:8 You must inscribe on the stones all the words of this law, making them clear.”

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