1 Chronicles 2:16

2:16 Their sisters were Zeruiah and Abigail. Zeruiah’s three sons were Abshai, Joab, and Asahel.

1 Chronicles 19:11

19:11 He put his brother Abishai in charge of the rest of the army and they were deployed against the Ammonites.

1 Chronicles 19:15

19:15 When the Ammonites saw the Arameans flee, they fled before Joab’s brother Abishai and withdrew into the city. Joab went back to Jerusalem.