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.
2 Samuel 20:9
Surrounding context
20:8 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.
20:9 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.
20:10 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.