Vayupurana 1.26.36

Vāyupurāṇa 1.26.36

tṛtīyāttu mukhāttasya ikāro yajuṣāṃ varaḥ.
yajurmayaḥ sa cādityo yajurvedo yataḥ smṛtaḥ .. 26.34 ..