Amasa was the son of Abigail and Ithra or Jether, making him David’s nephew and Absalom’s cousin. Absalom appointed him commander of the rebellious army. After the revolt, David promised him Joab’s position as commander. When Sheba rebelled, Amasa was charged with assembling Judah’s forces, but Joab murdered him at Gibeon while pretending to greet him. Another Amasa, son of Hadlai, was a chief of Ephraim during Ahaz’s reign.
Amasa appears in the accounts of Absalom’s revolt and Sheba’s rebellion. David’s appointment of him over the army was intended to conciliate him after the rebellion. His murder by Joab fulfilled the danger created by their rivalry. The other Amasa obeyed the prophet Oded by refusing to treat captured Judeans as slaves.
The name is traditionally connected with “burden,” though the supplied material notes that this derivation is mistaken. Amasa’s parentage is given in differing forms: 2 Samuel names Ithra, while 1 Chronicles calls his father Jether the Ishmaelite.