Skandapurana 16.13.16

16.13.16

uttare bhāskarasutā dakṣiṇe saritāṃ patiḥ ..
pūrvapaścimato devi rukmiṇīdvitayaṃ smṛtam .. 16 ..

To the north is the daughter of the sun, to the south the lord of rivers [the ocean]; / to the east and west, O goddess, the pair of Rukmiṇīs is recorded.