12 And Ama'sa lay wallowing in his blood in the highway. And any one who came by, seeing him, stopped; and when the man saw that all the people stopped, he carried Ama'sa out of the highway into the field, and threw a garment over him.

Matthew Henry's Commentary on 2 Samuel 20:12

Commentary on 2 Samuel 20:4-13

(Read 2 Samuel 20:4-13)

Joab barbarously murdered Amasa. The more plot there is in a sin, the worse it is. Joab contentedly sacrificed the interest both of the king and the kingdom to his personal revenge. But one would wonder with what face a murderer could pursue a traitor; and how, under such a load of guilt, he had courage to enter upon danger: his conscience was seared.