Skandapurana 6.3.42.4

6.3.42.4

mārkaṇḍeya uvāca -
mithilāstho mahābhāgo vedavedāṅgapāragaḥ .
yājñavalkyaḥ purā tāta cacāra vipulaṃ tapaḥ .. 42.4 ..

Mārkaṇḍeya said: / In ancient times, my dear, the illustrious Yājñavalkya, who lived in Mithilā / and was a master of the Vedas and Vedāṅgas, performed vast austerity.