When you arrive, look for Jehu son of Jehoshaphat, the son of Nimshi. Go in, get him away from his companions, and take him to an inner room.
We have here the anointing of Jehu to be king, who was, at this time, a commander (probably commander-in-chief) of the forces employed at Ramoth-Gilead, Kg2 9:14. There he was fighting for the king his master, but received orders from a higher king to fight against him.
Commenting on 2 Kings 9:1-10
And when thou comest thither,.... To Ramothgilead; but from whence he went is uncertain, doubtless where there was a school of the prophets, perhaps that which was erected near Jordan, on the other side of which lay Ramothgilead, Kg2 6:1, look out there Jehu the son of Jehoshaphat the son of Nimshi; the same that Elijah was ordered to anoint, but it was deferred till...
carry him to an inner chamber--both to ensure the safety of the messenger and to prevent all obstruction in the execution of the business.