Abishai and Abshai (1 Chron. 18:12 margin) [possessor of all that is desirable].
A son of David's sister Zeruiah, and brother of Joab and Asahel (2 Sam. 2:18; 1 Chron. 2:15, 16). When David found Saul and his followers asleep, Abishai asked permission to kill the king; but David would not sanction his doing harm to "the Lord's anointed" (1 Sam. 26:5-9). He served under Joab in David's army (2 Sam. 2:18 : 10:10).
When Abner, fleeing from the battle at Gibeon, was compelled to kill Asahel, Joab and Abishai, his two brothers, pursued the homicide, but without effect (2 Sam. 2:18-24). He was loyal to David during the revolts of Absalom and Sheba (2 Sam. 16 and 20). He desired to slay Shimei for cursing David, even when Shimei asked forgiveness (2 Sam, 16:9; 19:21).
He was one of David's mighty men who had lifted up his spear against three hundred and slain them (2 Sam. 23:18; 1 Chron. 11:20). He defeated the Edomites also in the valley of Salt, slaying eighteen thousand of them and garrisoning their country (1 Chron. 18:12, 13). He succored David in the fight with Ishbibenub (2 Sain. 21:16, 17).