2 Samuel 18:21-25

21Then said Joab to the Cushite, Go, tell the king what thou hast seen. And the Cushite bowed himself to Joab, and ran.

22And Ahimaaz the son of Zadok said yet again to Joab, Come what may, let me, I pray thee, also run after the Cushite. And Joab said, Why wilt thou run, my son, seeing that there is no news suited [to thee]?

23— But, come what may, let me run. And he said to him, Run. And Ahimaaz ran by the way of the plain, and outstripped the Cushite.

24And David sat between the two gates; and the watchman went up to the roof of the gate, on to the wall, and lifted up his eyes and looked, and behold, a man running alone.

25And the watchman cried, and told the king. And the king said, If he be alone, there is news in his mouth. And he came on and drew near.