2 Kings 9:14

9:14 Then Jehu son of Jehoshaphat son of Nimshi conspired against Joram.

Jehu the Assassin

Now Joram had been in Ramoth Gilead with the whole Israelite army, guarding against an invasion by King Hazael of Syria.

2 Kings 11:6

11:6 Another third of you will be stationed at the Foundation Gate. Still another third of you will be stationed at the gate behind the royal guard. You will take turns guarding the palace.