TSK · 1 Chronicles 11:20

The three sons of Zeruiah were there, Joab, and Abishai, and Asahel: and Asahel was as light of foot as a wild gazelle.

David sent forth the people, a third part under the hand of Joab, and a third part under the hand of Abishai the son of Zeruiah, Joab's brother, and a third part under the hand of Ittai the Gittite. The king said to the people, "I will surely go forth with you myself also."

But Abishai the son of Zeruiah helped him, and struck the Philistine, and killed him. Then the men of David swore to him, saying, "You shall go no more out with us to battle, that you don't quench the lamp of Israel."

and their sisters were Zeruiah and Abigail. The sons of Zeruiah: Abishai, and Joab, and Asahel, three.