Wall
'A wall,' as in Revelation 21, signifies the divine truth proceeding from the Lord, and so, the truth of faith from the good of charity. 'A wall' signifies truth in outer extremes.
(References: Apocalypse Explained 21; Apocalypse Revealed 132)
1 Kings 16:31-33
31
It happened, as if it had been a light thing for him to walk in the sins of Jeroboam the son of Nebat, that he took as wife Jezebel the daughter of Ethbaal king of the Sidonians, and went and served Baal, and worshiped him.
32
He reared up an altar for Baal in the house of Baal, which he had built in Samaria.
33
Ahab made the Asherah; and Ahab did yet more to provoke Yahweh, the God of Israel, to anger than all the kings of Israel who were before him.