2 Samuel 18:23-24

23Ahimaaz said, ‘But I do want to go, whatever happens.’ So Joab said, ‘Run after him, then!’ So Ahimaaz ran fast along a road in the Jordan Valley. He arrived near Mahanaim before the Ethiopian man.

24David was sitting between the two gates of Mahanaim city. A man went up to the top of the wall, on the roof above the gate. He was watching the road. As he looked, he saw a man who was running towards the city. He was running alone.