The Great Epic of the Bhārata dynasty 3.82.108

3.82.108

tatrodapāno dharmajña sarvapāpapramocanaḥ |
samudrāstatra catvāraḥ kūpe saṃnihitāḥ sadā |
tatropaspṛśya rājendra na durgatimavāpnuyāt || 108 ||

Repairing next to the tank of the celestials, one earneth immunity from misfortune, and also the merit of the horse-sacrifice. One should next go to Somapada, with subdued soul and leading a Brahmacharya mode of life. Bathing in Maheswarapada that is there, one reapeth the merit of the horse-sacrifice. There in that tirtha, O bull of the Bharata race, it is well known that ten millions of tirthas exist together. A wicked Asura in the shape of a tortoise had, O foremost of monarchs, been carrying it away when the powerful Vishnu recovered it from him. There in that tirtha should one perform his ablutions, for by this he acquireth the merit of the Pundarika sacrifice and ascendeth also to the region of Vishnu. Then, O best of kings, should one proceed to the place of Narayana, where, O Bharata, Narayana is ever present and dwelleth for aye. There the gods with Brahma at their head, Rishis endued with wealth of asceticism, the Adityas, the Vasus, and the Rudras, all adore Janardana, in that tirtha, and Vishnu of wonderful deeds hath become known as Salagrama. Approaching the eternal Vishnu, that lord of the three worlds, that giver of boons, one obtaineth the merit of the horse-sacrifice, and goeth to the region of Vishnu. There in that place, O virtuous one, is a well, capable of destroying every sin. The four seas are ever present in that well. He that bathes in it, O king, will have immunity from misfortune.