Bhagavatapurana 5.17.9

5.17.9

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tathaivālakanandā dakṣiṇena brahma-sadanād bahūni giri-kūṭāny atikramya hemakūṭād dhaimakūṭāny ati-rabhasatara-raṃhasā luṭhayantī bhāratam abhivarṣaṃ dakṣiṇasyāṃ diśi jaladhim abhipraviśati yasyāṃ snānārthaṃ cāgacchataḥ puṃsaḥ pade pade 'śvamedha-rājasūyādīnāṃ phalaṃ na durlabham iti //

9. Similarly, down the southern slopes of Meru, Alakananda descends; falling from one summit to another from the city of Brahma and, after issuing from Hemakuta, rolling her rapid waters over the summits of the Himalayas, she traverses the continent of Bharata on the south, and enters the sea; the person who journeys to bathe in this branch, acquires with ease at every step, the merit of having performed Aswamedha, Rajasuya, and other great sacrifices.