And the king said to Amasa, "Assemble the men of Judah for me within three days, and be present here yourself."
So Amasa went to assemble the men of Judah. But he delayed longer than the set time which David had appointed him.
And David said to Abishai, "Now Sheba the son of Bichri will do us more harm than Absalom. Take your lord's servants and pursue him, lest he find for himself fortified cities, and escape us."
So Joab's men, with the Cherethites, the Pelethites, and all the mighty men, went out after him. And they went out of Jerusalem to pursue Sheba the son of Bichri.
When they were at the large stone which is in Gibeon, Amasa came before them. Now Joab was dressed in battle armor; on it was a belt with a sword fastened in its sheath at his hips; and as he was going forward, it fell out.
Then Joab said to Amasa, "Are you in health, my brother?" And Joab took Amasa by the beard with his right hand to kiss him.
But Amasa did not notice the sword that was in Joab's hand. And he struck him with it in the stomach, and his entrails poured out on the ground; and he did not strike him again. Thus he died. Then Joab and Abishai his brother pursued Sheba the son of Bichri.
Meanwhile one of Joab's men stood near Amasa, and said, "Whoever favors Joab and whoever is for David--follow Joab!"
But Amasa wallowed in his blood in the middle of the highway. And when the man saw that all the people stood still, he moved Amasa from the highway to the field and threw a garment over him, when he saw that everyone who came upon him halted.
When he was removed from the highway, all the people went on after Joab to pursue Sheba the son of Bichri.
And he went through all the tribes of Israel to Abel and Beth Maachah and all the Berites. So they were gathered together and also went after Sheba.
References for 2 Samuel 20:14