Matthew Poole and continuators on 1 Kings 22:39

39 Now the rest of the acts of Ahab, and all that he did, and the ivory house which he made, and all the cities that he built, are they not written in the book of the chronicles of the kings of Israel?

Heb. the house of the tooth or teeth, to wit, of Elephants: See chap. 10. 18. Not that it was made wholly of solid Ivory, but because the other materials were covered, or intermixed, or adorned with Ivory. Compare Amos 3. 15.