So David went up there [to Hebron] with his two wives also, Ahinoam of Jezreel and Abigail the widow of Nabal of Carmel [in Judah].

his second, Chileab, by Abigail the widow of Nabal of Carmel; the third, Absalom the son of [his wife] Maacah, daughter of Talmai the king of Geshur;

Absalom put Amasa in command of the army instead of Joab. Now Amasa was the son of a man named Ithra the Israelite, who had married Abigail the daughter of Nahash, [the half sister of David and] the sister of Zeruiah, Joab’s mother.