2 Kings 9:14-21

14 So Jehu the son of Jehoshaphat the son of Nimshi conspired against Joram. (Now Joram had kept Ramothgilead, he and all Israel, because of Hazael king of Syria.
15 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.
16 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.
17 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?
18 So there went one on horseback to meet him, and said, Thus saith the king, Is it peace? And Jehu said, What hast thou to do with peace? turn thee behind me. And the watchman told, saying, The messenger came to them, but he cometh not again.
19 Then he sent out a second on horseback, which came to them, and said, Thus saith the king, Is it peace? And Jehu answered, What hast thou to do with peace? turn thee behind me.
20 And the watchman told, saying, He came even unto them, and cometh not again: and the driving is like the driving of Jehu the son of Nimshi; for he driveth furiously.
21 And Joram said, Make ready. And his chariot was made ready. And Joram king of Israel and Ahaziah king of Judah went out, each in his chariot, and they went out against Jehu, and met him in the portion of Naboth the Jezreelite.