Skandapurana 6.3.155.8

6.3.155.8

purā kṛtayugasyādau toṣituṃ girijāpatim .
tapaścacāra vipulaṃ viṣṇurvarṣasahasrakam .
vāyubhakṣo nirāhāraḥ śuklatīrthe vyavasthitaḥ .. 155.8 ..

Formerly, at the beginning of the Kṛta Yuga, Viṣṇu performed vast austerity / for a thousand years in order to please the husband of Girijā, / subsisting on wind, taking no food, settled at Śuklatīrtha.