2 Kings 9:2

Jehu the son of Jehoshaphat the son of Nimshi Jehu was no doubt well known both in the army and elsewhere, and his afterlife shews that he was a man of action and with very slight scruples. The watchman on the tower in Jezreel knows his manner of riding, and there seems to have been little hesitation on the part of the messengers whom Joram sent out about obeying Jehu's order -Turn thee behind me."

and go in We see from this that the troops and officers of Israel were within the city, and holding it against the Syrians.

from among his brethren i.e. His fellow officers, his brothers in arms.

to an inner chamber Literally -a chamber within a chamber". See note on 1 Kings 20:30. The design of this privacy was no doubt that Jehu might be at liberty to take his own measures for carrying out his commission, without the interference of any but comrades of his own choice.