Absalom had put Amasa in command of the army in Joab’s place. Amasa was the son of an Ishmaelite named Ithra, who had married Abigail, daughter of Jesse and sister of Joab’s mother Zeruiah.
Joab, son of Zeruiah, and the servants of David also set out and encountered them at the pool of Gibeon. And they sat down, one group on one side of the pool and the other on the opposite side.
Although I am the anointed king, I am weak this day, and these men, the sons of Zeruiah, are too ruthless for me. May the Lord repay the evildoer in accordance with his evil deed.”
Abishai, the brother of Joab, was the chief of the Thirty; he brandished his spear over three hundred, whom he had slain. He made a name beside the Three,
David asked Ahimelech the Hittite, and Abishai, son of Zeruiah and brother of Joab, “Who will go down into the camp with me to Saul?” Abishai replied, “I will.”