2 Samuel 20:11-13

One of Joab's men stood by him By the command of his master, who knew that this would occasion disorder among Amasa's soldiers, and therefore left a man there on purpose to deliver the following message: He that favoureth Joab He that would have Joab to be general, rather than such a perfidious rebel as Amasa. And he that is for David He that wisheth David good success against Sheba, and against all rebels. He cunningly joins David and Joab together, as if their interests were inseparable. When the man saw that all the people stood still Wondering at the spectacle, and inquiring into the occasion of it. He removed Amasa out of the highway Perceiving that it both incensed them against Joab, and hindered the king's service. And cast a cloth upon him But the covering of blood with a cloth cannot stop its cry to God for vengeance. All the people went on after Joab They that were behind did not know that Amasa was killed, and so marched on without any scruple.