KJV:
But Pekah the son of Remaliah, a captain of his, conspired against him, and smote him in Samaria, in the palace of the king's house, with Argob and Arieh, and with him fifty men of the Gileadites: and he killed him, and reigned in his room.
NASB:
Then Pekah son of Remaliah, his officer, conspired against him and struck him in Samaria, in the castle of the king's house with Argob and Arieh; and with him were fifty men of the Gileadites, and he killed him and became king in his place.