Deuteronomy 27:4-6

Wycliffe Bible

⁴ Therefore when thou hast passed (the) Jordan, raise thou up the stones which I command today to thee, in the hill of Ebal; and thou shalt make them plane with chalk. (And so when thou hast crossed over the Jordan River, raise thou up these stones on Mount Ebal, as I command to thee today, and thou shalt make them plane with chalk.)

⁵ And there thou shalt build an altar to thy Lord God, of stones which iron touched not, (And thou shalt build an altar there to the Lord thy God, out of stones which iron hath not touched,)

⁶ and of stones unformed and unpolished; and thou shalt offer thereon burnt sacrifices to thy Lord God; (yea, of unformed and unpolished stones; and thou shalt offer burnt sacrifices on it to the Lord thy God;)