21 Then Joab said to a Cushite, “Go, tell the king what you have seen.” The Cushite bowed down before Joab and ran off.

Read 2 Samuel 18:21 Using Other Translations

Then said Joab to Cushi, Go tell the king what thou hast seen. And Cushi bowed himself unto Joab, and ran.
Then Joab said to the Cushite, "Go, tell the king what you have seen." The Cushite bowed before Joab, and ran.
Then Joab said to a man from Ethiopia, “Go tell the king what you have seen.” The man bowed and ran off.