'Palm trees' in the Bible

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

And he gathered to him the sons of Ammon and Amalek, and he went and smote Israel, and they possessed the city of palm trees.