2 Samuel 18:24-25

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.

25So the man on the wall shouted a message to the king, to say what he had seen. The king said, ‘If the man is alone, he is bringing good news.’ The man who was running towards the city came much nearer.