Deuteronomy 11:29-30

When the LORD your God brings you into the land you will take as your own, you are to announce the blessings from Mount Gerizim and the curses from Mount Ebal. (These mountains are on the other side of the Jordan River, to the west, toward the sunset. They are near the great trees of Moreh in the land of the Canaanites who live in the Jordan Valley opposite Gilgal.)