Jamieson, Fausset and Brown on 2 Chronicles 12:3-5

3-5. the Lubims--the Libyans of northeastern Africa.

the Sukkiims--Some think these were the Kenite Arabs, dwellers in tents, but others maintain more justly that these were Arab troglodytes, who inhabited the caverns of a mountain range on the western coast of the Red Sea.

and the Ethiopians--from the regions south of Egypt. By the overwhelming force of numbers, they took the fortresses of Judah which had been recently put in a state of defense, and marched to lay siege to the capital. While Shishak and his army was before Jerusalem, the prophet Shemaiah addressed Rehoboam and the princes, tracing this calamity to the national apostasy and threatening them with utter destruction in consequence of having forsaken God (2Ch 12:6).