Devibhagavatapurana 9.13.114

9.13.114

vaktraiścaturbhiḥ saṃstūya bhaktinamrātmakandharaḥ |
dhātā caturṇāṃ vedānāmuvāca caturānanaḥ ||

Brahmâ said:-- “O Râdhe! Gangâ, appeared from Thee and the Lord S’rî Krisna. Both of you were transformed before into the liquid forms in the Râsâ Mandalam, on hearing the music of S'ankara. And That Lquid Form is Gangâ. So She is born of Thee and S’rî Krisna. Hence She is like Thy daughter and to be loved as such. She will be initiated in Thy Mantra and She will worship Thee. The four armed Lord of Vaikuntha will be Her husband. And when She will appear in parts on earth, the Salt Ocean will be Her husband. O Mother! The Gangâ that dwells in Goloka, is dwelling everywhere. O Governess of the Devas! Thou art Her mother; and She is always Thy Self born daughter.” Hearing thus, the words of Brahmâ, Râdhâ gave Her assent towards the protection of Gangâ. And then Gangâ appeared from the toe-tip of S’rî Krisna. The liquid Gangâ, then, assumed Her own form and, getting up from water, was received with great honour by the Devas. Bhagavân Brahmâ took a little of that Ganges water in His Kamandalu and Bhagavân Mahâdeva kept some of it in His own head.
The lotus born Brahmâ, then, initiated Gangâ into the Râdhâ Mantra and gave Her instructions, Râdhâ Stotra (hymn of Râdhâ) according to the Sâma Veda, Râdhâ Kavacha (protection mantras), Râdhâ Dhyân (meditation on Râdhâ), method of worship of Râdhâ, and Râdhâ's purascharana. Gangâ worshipped Râdhâ according to those instructions and went to Vaikuntha. O Muni! Laksmî, Sarasvatî, Gangâ, and the world purifying Tulasî, these four became the wives of Nârâyana. Krisna, then, smiled and explained to Brahmâ the history of Time, hardly to be comprehended by others. He then spoke:-- “O Brahmâ! O Visnu! O Mahes'vara! Now you better take Gangâ and I will now tell you what a change has been effected by this time. Hear.