Sent spies. — These were agents who were to sound the people in the various parts of the land, and doubtless to communicate the conspiracy only secretly, and to those whom they found favourably disposed. They started from Jerusalem, perhaps, at the same time with Absalom, or possibly had been sent out quietly, a few at a time, beforehand. The signal for rising was to be a messenger with a trumpet.
Related Commentaries of 2 Samuel 15:10
2 Samuel 15:10
10 But Absalom sent spies throughout all the tribes of Israel, saying, As soon as ye hear the sound of the trumpet, then ye shall say, Absalom reigneth in Hebron.