built an altar

Genesis 8:20
Then Noah built an altar to the LORD. Taking from every kind of clean animal and clean bird, He offered burnt offerings on the altar.

Genesis 12:7, 8
Then the LORD appeared to Abram and said, "I will give this land to your offspring." So Abram built an altar there to the LORD, who had appeared to him. . . .

Joshua 8:33
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.