'Palm trees' in the Bible

The children of the Kenite, Moses' brother-in-law, went up out of the city of palm trees with the children of Judah into the wilderness of Judah, which is in the south of Arad; and they went and lived with the people.

He gathered to him the children of Ammon and Amalek; and he went and struck Israel, and they possessed the city of palm trees.