2 Samuel 20:8-10

8When they were at the great stone which is in Gibeon, Amasa went before them. And Joab’s garment that he had put on was girded to him, and upon it a belt with a sword fastened upon his loins in its sheath; and as he went forth it fell out. 9And Joab said to Amasa, Art thou in health, my brother? And Joab took Amasa by the beard with the right hand to kiss him. 10But Amasa took no heed to the sword that was in Joab’s hand: so he smote him in the fifth rib, and shed out his inward parts to the ground, and struck him not again; and he died. So Joab and Abishai his brother pursued after Sheba the son of Bichri.1