David said to Abishai,1 "Now Sheba son of Bicri will do us more harm than Absalom did. Take your master's men and pursue him, or he will find fortified cities and escape from us."
References for 2 Samuel 20:6
So Joab's men and the Kerethites2 and Pelethites and all the mighty warriors went out under the command of Abishai. They marched out from Jerusalem to pursue Sheba son of Bicri.
References for 2 Samuel 20:7
While they were at the great rock in Gibeon,3 Amasa came to meet them. Joab4 was wearing his military tunic, and strapped over it at his waist was a belt with a dagger in its sheath. As he stepped forward, it dropped out of its sheath.
References for 2 Samuel 20:8
Joab said to Amasa, "How are you, my brother?" Then Joab took Amasa by the beard with his right hand to kiss him.
Amasa was not on his guard against the dagger5 in Joab's6 hand, and Joab plunged it into his belly, and his intestines spilled out on the ground. Without being stabbed again, Amasa died. Then Joab and his brother Abishai pursued Sheba son of Bicri.
References for 2 Samuel 20:10