Vishnupurana 2.2.31

2.2.31

tasyāḥ samantataś cāṣṭau diśāsu vidiśāsu ca
indrādilokapālānāṃ prakhyātāḥ pravarāḥ puraḥ //

On the summit of Meru is the vast city of Brahmá, extending fourteen thousand leagues, and renowned in heaven; and around it, in the cardinal points and the intermediate quarters, are situated the stately cities of Indra and the other regents of the spheres. The capital of Brahmá is enclosed by the river Ganges, which, issuing from the foot of Vishńu, and washing the lunar orb, falls here from the skies, and, after encircling the city, divides into four mighty rivers, flowing in opposite directions. These rivers are the Śítá, the Alakanandá, the Chakshu, and the Bhadrá. The first, falling upon the tops of the inferior mountains, on the east side of Meru, flows over their crests, and passes through the country of Bhadráśwa to the ocean: the Alakanandá flows south, to the country of Bhárata, and, dividing into seven rivers on the way, falls into the sea: the Chakshu falls into the sea, after traversing all the western mountains, and passing through the country of Ketumála: and the Bhadrá washes the country of the Uttara kurus, and empties itself into the northern ocean.