Moses built an altar, and he called it “The Lord is my Banner,”

When Aaron saw this, he built an altar before it, and Aaron made a proclamation and said, “Tomorrow will be a feast to the Lord.”

So they put foremen over the Israelites to oppress them with hard labor. As a result they built Pithom and Rameses as store cities for Pharaoh.

and Moses wrote down all the words of the Lord. Early in the morning he built an altar at the foot of the mountain and arranged twelve standing stones – according to the twelve tribes of Israel.