Sumadhva Vijaya 3.54
adhigatopaniShacca sakR^itChrutA
prakaTabhAgavatIti na vismayaH .
adhigatA nanu jAtvapi na shrutAH
pratibhayA shrutayaH shatasho.amunA ..54..
padachChedaH:
adhigatA upaniShat ca sakR^itChrutA prakaTabhAgavatI iti na vismayaH adhigatAH nanu jAtu api na shrutAH pratibhayA shrutayaH shatashaH amunA.
anvayaH:
amunA sakR^itChrutA prakaTabhAgavatI upaniShat ca adhigatA iti na vismayaH jAtu api na shrutAH shatashaH shrutayaH pratibhayA adhigatAH nanu.
anvayArthaH:
amunA = By this vAsudeva sakR^itChrutA = once heard prakaTabhAgavatI = mahAnArAyaNa upanishat, which clearly expounds bhagavAn nArAyaNa upaniShat = aitareya upanishat ca = and adhigatA = learnt iti = this is na = no vismayaH = wonder jAtu = once api = even na = not shrutAH = heard shatashaH = hundreds of shrutayaH = Vedic hymns pratibhayA = by his intellect adhigatAH = learnt nanu = is it not?
Summary:
Vasudeva once comprehended aitareya upanishat and also mahAnArAyaNa upanishat, which clearly expounds bhagavAn nArAyaNa just by listening to them once from the mouth of his teacher. This is no wonder. Does he not already know hundreds of unheard Vedic hymns by the sole power of his superior intellect?
Notes: vAsudeva being the incarnation of vAyu, needs no teacher to learn the Vedic hymns. He knows all Vedas by the sole power of his superior intellect alone. Therefore learning the entire upanishat after hearing it only once is not really a wonder.