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SB 12.6.72
atha ha bhagavams tava carana-nalina-yugalam tri-bhuvana-gurubhir abhivanditam aham ayata-yama-yajus-kama
upasaramiti.
Translation:
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.