SB 12.12.8
viduroddhava-samvadah
ksattr-maitreyayos tatah
purana-samhita-prasno
maha-purusa-samsthitih
Translation:
This scripture also relates the discussions Vidura had with Uddhava and with Maitreya, inquiries about the subject matter of this Purana, and the winding up of creation within the body of the Supreme Lord at the time of annihilation.