Skandapurana 16.128.4

16.128.4

ya eṣa sāgaro devi yojanāyatavistaraḥ ..
āyato'śītisāhasraṃ yojanānāṃ prakīrtitaḥ .. 4 ..

This ocean, O goddess, which is a yojana in extent and breadth, / is proclaimed to extend eighty thousand yojanas;