20:7 Joab's men - The remainders of Joab's army who were there present, with whom also Joab might go as a reformade, watching an opportunity to do what he designed.
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.
