Abishai (a-bĭsh'a-î or a-bĭ-shâ'i), father of a gift, eldest son of Zeruiah, David's sister, brother of Joab and Asahel, one of the bravest of David's "mighty men," 1 Chronicles 2:16, always faithful to his royal uncle, and usually a personal attendant. He went with him alone to the tent of Saul, 1 Samuel 1:26-12, and was a leader in the war with Ish-bosheth, 2 Samuel 2:18, 2 Samuel 2:24, in the war with the Edomites, 1 Chronicles 1:18-13, and with the Syrians and Ammonites. 2 Samuel 10:10, 2 Samuel 10:14. In a battle with the Philistines he rescued David, and slew Ish bi-benob the giant, 2 Samuel 1:21-17. He broke through their host around Bethlehem, and lifted up his spear against 300, and slew them, 2 Samuel 1:23-18 : and was with David in the matters of Shimei, Absalom, and Sheba. 2 Samuel 16:9, 2 Samuel 18:2, 2 Samuel 19:21, 2 Samuel 1:20-7.