2 Kings 9:15 (KJV)

Then they hasted, and took every man his garment, and put it under him on the top of the stairs, and blew with trumpets, saying, Jehu is king.

So Jehu the son of Jehoshaphat the son of Nimshi conspired against Joram. (Now Joram had kept Ramoth–gilead, he and all Israel, because of Hazael king of Syria.

But king Joram was returned to be healed in Jezreel of the wounds which the Syrians had given him, when he fought with Hazael king of Syria.) And Jehu said, If it be your minds, then let none go forth nor escape out of the city to go to tell it in Jezreel.

So Jehu rode in a chariot, and went to Jezreel; for Joram lay there. And Ahaziah king of Judah was come down to see Joram.

And there stood a watchman on the tower in Jezreel, and he spied the company of Jehu as he came, and said, I see a company. And Joram said, Take an horseman, and send to meet them, and let him say, Is it peace?