Then Joab said to the Cushite, "Go, tell the king what you have seen." So the Cushite bowed himself to Joab and ran.
2 Samuel 18:21
Surrounding context
18:20 And Joab said to him, "You shall not take the news this day, for you shall take the news another day. But today you shall take no news, because the king's son is dead."
18:21 Then Joab said to the Cushite, "Go, tell the king what you have seen." So the Cushite bowed himself to Joab and ran.
18:22 And Ahimaaz the son of Zadok said again to Joab, "But whatever happens, please let me also run after the Cushite." So Joab said, "Why will you run, my son, since you have no news ready?"