Shalya Parva 34.32

Accompanied by his priests and friends, Baladeva first went to the Tirthas called Prabhasa. There, the Lord of the asterism (viz., Soma), who had been suffering from phthisis, was freed from his disease. Regaining energy there, O king, be now lights up the universe. And because that foremost of Tirthas on Earth had formerly invested Soma again with effulgence, it is, therefore, called Prabhasa.