John Wesley on 2 Samuel 20:14

He - Sheba, who marched from tribe to tribe to stir them up to sedition. Abel - Unto Abel - beth - maachah, as this place is called here in the Hebrew text, ver.15, to distinguish it from other Abels; and to signify, that this was that Abel which was in the northern border of Canaan towards that part of Syria called Maachah, 2Sam 10:8. Berites - Such as lived in the city, or territory of Beeroth of Benjamin, Josh 18:25, who being of the same tribe, if not city with Sheba, adhered to him, and followed him through all the tribes of Israel. They - The tribes of Israel; that is, a considerable number of them; as might well be expected, when the discontents were so high and general.