2 Samuel 18:24-27

24And David sat between the two gates: and the watchman went up to the roof over the gate to the wall, and lifted up his eyes, and looked, and behold a man running alone. 25And the watchman called, and told the king. And the king said, If he is alone, there is tidings in his mouth. And he came apace, and drew near. 26And the watchman saw another man running: and the watchman called to the porter, and said, Behold another man running alone. And the king said, He also bringeth tidings. 27And the watchman said, I think the running of the foremost is like the running of Ahimaaz the son of Zadok. And the king said, He is a good man, and cometh with good news.1