Deuteronomy 11:29-30

11:29 When the Lord your God brings you into the land you are to possess, you must pronounce the blessing on Mount Gerizim and the curse on Mount Ebal. 11:30 Are they not across the Jordan River, toward the west, in the land of the Canaanites who live in the Arabah opposite Gilgal near the oak of Moreh?

Joshua 8:30-33

Covenant Renewal

8:30 Then Joshua built an altar for the Lord God of Israel on Mount Ebal, 8:31 just as Moses the Lord’s servant had commanded the Israelites. As described in the law scroll of Moses, it was made with uncut stones untouched by an iron tool. They offered burnt sacrifices on it and sacrificed tokens of peace. 8:32 There, in the presence of the Israelites, Joshua inscribed on the stones a duplicate of the law written by Moses. 8:33 All the people, rulers, leaders, and judges were standing on either side of the ark, in front of the Levitical priests who carried the ark of the covenant of the Lord. Both resident foreigners and native Israelites were there. Half the people stood in front of Mount Gerizim and the other half in front of Mount Ebal, as Moses the Lord’s servant had previously instructed to them to do for the formal blessing ceremony.