And he removed from thence unto the mountain on the east of Beth-el, and pitched his tent, having Beth-el on the west, and Ai on the east: and there he builded an altar unto the LORD, and called upon the name of the LORD.
And Moses wrote all the words of the LORD, and rose up early in the morning, and builded an altar under the mount, and twelve pillars, according to the twelve tribes of Israel.
And thou shalt make the altar of acacia wood, five cubits long, and five cubits broad; the altar shall be foursquare: and the height thereof shall be three cubits.