Deuteronomy 27:2-4

2And it shall be on the day when ye pass over the Jordan unto the land which Jehovah thy 1God giveth thee, that thou shalt set thee up great stones, and plaster them with plaster:

3and thou shalt write upon them all the words of this law, when thou goest over that thou mayest enter into the land which Jehovah thy 2God giveth thee, a land flowing with milk and honey, as Jehovah the 3God of thy fathers hath promised thee.

4And it shall be when ye go over the Jordan, that ye shall set up these stones, as I command you this day, on mount Ebal, and thou shalt plaster them with plaster.