Srimad-Bhagavatam: Canto 3 - Chapter 1 - Verse 36
Sanskrit:
विदुर उवाचस वै विश्वसृजामीशो वेदादीन् मुखतोऽसृजत् ।यद् यद् येनासृजद् देवस्तन्मे ब्रूहि तपोधन ॥ ३६ ॥
ITRANS:
vidura uvācasa vai viśva-sṛjām īśovedādīn mukhato ’sṛjatyad yad yenāsṛjad devastan me brūhi tapo-dhana
Translation:
Vidura said: O great sage whose only wealth is penance, kindly explain to me how and with whose help Brahmā established the Vedic knowledge which emanated from his mouth.