As in Bible times, God gives warning of His justice

The night of the passover was known beforehand to our fathers, that, with sure knowledge of the oaths in which they put their faith, they might have courage. Your people awaited the salvation of the just and the destruction of their foes. For when you punished our adversaries, in this you glorified us whom you had summoned. For in secret the holy children of the good were offering sacrifice and putting into effect with one accord the divine institution.

– The Book of Wisdom, 8:6-9