Therefore, my lord, I am prayerfully approaching your lotus feet, which are honored by the spiritual masters of the three worlds, because I hope to receive from you mantras of the Yajur Veda unknown to anyone else.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
अथ ह भगवंस्तव चरणनलिनयुगलं त्रिभुवनगुरुभिरभिवन्दितमहमयात- यामयजुष्काम उपसरामीति
atha ha bhagavaṃstava caraṇanalinayugalaṃ tribhuvanagurubhirabhivanditamahamayāta- yāmayajuṣkāma upasarāmīti
SB 12.6.72