((For) indeed if they) i.e. the Banu Qurayzah (are driven out) from Medina (they) the hypocrites (go not out with them, and indeed if they are attacked) by the Prophet (pbuh) (they help not) against Muhammad (pbuh) (and indeed if they had helped them) against Muhammad (pbuh) (they would have turned and fled) in defeat, (and then they would not have been victorious) they will not escape what will befall them.