Easton's Bible Dictionary (1897)
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 Bible Dictionary (1863)
(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.)
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
ZERUI'AH (cleft, wounded), a sister of David, and the mother of Joab. 1 Sam 26:6; 1 Chr 2:16.
Hitchcock's Bible Names (1869)
pain or tribulation of the Lord