Arcana Coelestia # 1454
1454. 'And he built an altar to Jehovah' means external worship of His Father arising out of that state. This is clear from the meaning of 'an altar' as the chief representative in worship, 921.
Hosea 10:15
15
So shall Bethel do unto you because of your great wickedness: in a morning shall the king of Israel utterly be cut off.