He left from there to the mountain on the east of Beit-El, and pitched his tent, having Beit-El on the west, and `Ai on the east. There he built an altar to the LORD and called on the name of the LORD.
Moshe wrote all the words of the LORD, and rose up early in the morning, and built an altar under the mountain, and twelve pillars for the twelve tribes of Yisra'el.
*You shall make the altar of shittim wood, five cubits long, and five cubits broad; the altar shall be foursquare: and its height shall be three cubits.