And he removed from there unto a mountain on the east of Bethel, and pitched his tent, having Bethel on the west, and Ai on the east: and there he built an altar unto the LORD, and called upon the name of the LORD.
Read Chapter 12
Ambrose of Milan
Where there is Bethel, that is, the house of God, there is also the altar. Where there is the altar, there is also the calling on the name of God. It is not by chance that he made such great progress. He hoped in the help of God. The athlete of God exercised and strengthened himself in adversity. He went into the desert. . ...
Bethel, as it was called in the days of Moses, being the ancient Luza, chap. 28. On the west, Hebrew, towards the sea or Mediterranean, which lay west of Palestine. Bethel signifies the house of God, being honoured with two altars. (Haydock)