Ramayana
यद्वा पुरेष्वयुक्तानि जना जनपदेषु च । कुर्वते न च रक्षा ऽस्ति तदा कालकृतं भयम् ॥ 7-73-17 ॥
Or else, when men in the cities and in the countryside commit improper deeds and there is no protection against them, then arises the danger wrought by Time.
english translation