They are those who disbelieved and barred you from the Holy Mosque and the offering detained so as not to reach its place of sacrifice if it had not been for certain believing men and certain believing women whom you did not know, you might have trampled upon them, and so sin reached you because of (killing) them while you did not know. In order that Allah admits into His Mercy whom He will, had they (the believers) been easy to distinguish, We would have punished the unbelievers among them with a painful punishment.