Stricken of the Lord, David’s sister, and the mother of Abishai,
Joab, and Asahel (1 Chr. 2:16), who were the three leading
heroes of David’s army, and being his nephews, they were
admitted to the closest companionship with him.
Smith's Dictionary
(balsam), the mother of the three leading heroes of David’s army—Abishai, Joah and Asahel— known as the “sons of Zeruiah.” Of Zeruiah’s husband there is no mention in the Bible. (B.C. before 1046.)