Albert Barnes Commentary 2 Kings 9:5

"And when he came, behold, the captains of the host were sitting; and he said, I have an errand to thee, O captain. And Jehu said, Unto which of us all? And he said, To thee, O captain." — 2 Kings 9:5 (ASV)

The chief officers—the generals—were assembled together in Jehu’s quarters, perhaps holding a council of war. The place of assembly seems to have been the great court. Therefore, Jehu went into the house (2 Kings 9:6); that is, he entered one of the rooms opening into the court.