“Look!” The Greek word is idou (#2400 ἰδού), and it is used to get our attention. See commentary on Matthew 1:20 (“Look!).
“inner rooms.” A reference to the inner rooms of the Temple. It would have been a sin for an ordinary Israelite to enter into the Holy Place or the Holy of Holies of the Temple, so it was safe to say the Messiah was in there when no one would check to see if the report was true.