מלכים ב, פרק ט׳, פסוק י״ח

A sudden encounter on the road serves as a calculated tactical move designed to protect a crucial element of surprise. When the king's horseman arrives to meet Jehu, he asks if all is well [ביאור שטיינזלץ]. Jehu immediately dismisses the inquiry. The primary approach among commentators is that Jehu intends to make it clear that the state of affairs is none of the messenger's business and that he must stop asking questions [מצודת דוד, ביאור שטיינזלץ].

Instead of allowing the rider to return, Jehu orders him to turn around, join his men, and take a position at the back of the camp [מצודת דוד, מצודת ציון, ביאור שטיינזלץ]. The messenger obeys this command right away, even though he has no idea where the group is heading. His quick surrender is a direct result of Jehu's determined, charismatic personality and the intimidating presence of his impressive escort [ביאור שטיינזלץ].

The goal behind detaining the messenger is strictly strategic. By keeping the rider from going back, Jehu ensures that the king remains completely unaware of the approaching danger, making it much easier to carry out the plan to kill him [רלב״ג]. Meanwhile, observing from a distance, the watchman simply reports that the king's messenger has reached the group [ביאור שטיינזלץ, מצודת ציון].