2 Samuel 2:13

2:13 Joab son of Zeruiah and the servants of David also went out and confronted them at the pool of Gibeon. One group stationed themselves on one side of the pool, and the other group on the other side of the pool.

2 Samuel 2:18

2:18 The three sons of Zeruiah were there – Joab, Abishai, and Asahel. (Now Asahel was as quick on his feet as one of the gazelles in the field.)