Ramayana
तस्मिन्युगे प्रज्वलिते धर्मभूते ह्यनावृते । अधर्मः पादमेकं तु पातयत्पृथिवीतले ॥ 7-74-15 ॥
In that age which blazed with splendor, was filled with the nature of dharma, and was unobstructed, adharma caused but a single foot of itself to descend upon the surface of the earth.
english translation