2 Samuel 2:13

“If he is able to fight with me and strike me down, then we will become your slaves; but if I prevail against him and strike him down, then you shall become our slaves and serve us.”

They were at the large stone which is in Gibeon, and Amasa came to meet them. Now Joab was dressed in his military attire, and over it was a belt with a sword in its sheath fastened at his waist; and as he came out, it fell out.

“Now you also know what Joab the son of Zeruiah did to me, what he did to the two commanders of the armies of Israel, to Abner the son of Ner, and to Amasa the son of Jether, whom he killed; he also shed the blood of war in peace. And he put the blood of war on his belt about his waist, and on his sandals on his feet.

So they took all the men and went to fight with Ishmael the son of Nethaniah, and they found him by the great pool that is in Gibeon.