Deuteronomy 27:4-6

Amplified Bible, Classic Edition

⁴ And when you have gone over the Jordan, you shall set up these stones, as I command you this day, on Mount Ebal, and coat them with plaster.

⁵ And there you shall build an altar to the Lord your God, an altar of stones; you shall not lift up any iron tool upon them.

⁶ You shall build the altar of the Lord your God of whole stones and offer burnt offerings on it to Him;