Garudapurana 3.29.9

3.29.9

bhāgīrathyāśca catvāri rūpāṇyāsankhageśvara /
mahābhiṣagjanendrasya bhāryā tu hyabhiṣecanī //

And there were four forms of the Bhāgīrathī, O lord of birds: / she was the wife who anointed Mahābhiṣaj, the lord of men;