The Israelites, with their leaders, officers, and judges, as well as the foreigners among them, stood on two sides of the Lord's Covenant Box, facing the levitical priests who carried it. Half of the people stood with their backs to Mount Gerizim and the other half with their backs to Mount Ebal. The Lord's servant Moses had commanded them to do this when the time came for them to receive the blessing. 1
References for Joshua 8:33
8.33-35 Dt 11.29; 27.11-14.