Amasa was the son of
David's sister Abigail. During Absalom's revolt he served as commander of the rebel army. After Absalom's defeat, David sought to reunify the kingdom and promised Amasa Joab's position as commander. When Sheba son of Bichri led another rebellion, David ordered Amasa to assemble Judah's troops. Amasa was delayed, and David sent Abishai and Joab's men ahead. When Joab met Amasa at Gibeon, he greeted him as a brother and then unexpectedly stabbed him to death. Joab resumed command and pursued Sheba.