Deuteronomy 27:4-6

21st Century King James Version

⁴ Therefore it shall be when ye have gone over the Jordan, that ye shall set up these stones, which I command you this day, on Mount Ebal, and thou shalt plaster them with plaster.

⁵ And there shalt thou build an altar unto 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 burnt offerings thereon unto the Lord thy God.