2 Samuel 18:25

And the watchman cried and told the king
Called with a loud voice from the roof of the watchtower to the king, sitting between the gates, and informed him what he saw:

and the king said, if he [be] alone [there is] tidings in his mouth;
for if the army was routed and fled, and were pursued, there would be more in company, or several running one after another; but being but one, it was highly improbable that he was sent express:

and he came apace, and drew near;
which was another sign of his being a messenger, the haste he made towards the city.