4 And when you have crossed the Jordan, you are to set up these stones on Mount Ebal, as I am commanding you today, and you are to coat them with plaster.
Deuteronomy 27:4 Cross References - BSB
Deuteronomy 11:29-30
29 When the LORD your God brings you into the land you are entering to possess, you are to proclaim the blessing on Mount Gerizim and the curse on Mount Ebal.
30 Are not these mountains across the Jordan, west of the road toward the sunset, in the land of the Canaanites who live in the Arabah opposite Gilgal near the Oak of Moreh?
Joshua 8:30-33
30 At that time Joshua built an altar on Mount Ebal to the LORD, the God of Israel,
31 just as Moses the servant of the LORD had commanded the Israelites. He built it according to what is written in the Book of the Law of Moses: “an altar of uncut stones on which no iron tool has been used.” And on it they offered burnt offerings to the LORD, and they sacrificed peace offerings.
32 And there in the presence of the Israelites, Joshua inscribed on the stones a copy of the law of Moses, which he had written.
33 All Israel, foreigners and citizens alike, with their elders, officers, and judges, stood on both sides of the ark of the covenant of the LORD facing the Levitical priests who carried it. Half of the people stood in front of Mount Gerizim and half of them in front of Mount Ebal, as Moses the servant of the LORD had commanded earlier, to bless the people of Israel.