Judges 3:19

But he himself turned again from the quarries, or boundary-stones, that were by Gilgal, unto which point he had accompanied the rest of the delegation, returning to the quarters of the Moabite king, and said, I have a secret errand unto thee, O king; who said, Keep silence, thus bidding Ehud wait until the room was cleared before imparting his secret message, which Eglon naturally thought to be of value to him, especially since the return of Ehud alone seemed to indicate that he did not want his companions to know what he had to say. And all that stood by him, the usual attendants of the king, went out from him, at the king's signal indicating that he wished to be alone with the visitor.