Narrated Anas bin Malik:
A man said, "O Allah's Prophet! Will Allah gather the non-believers on their faces on the Day of Resurrection?" He said, "Will not the One Who made him walk on his feet in this world, be able to make him walk on his face on the Day of Resurrection?" (Qatada, a subnarrator, said: Yes, By the Power of Our Lord!)
USC-MSA web (English) reference: Vol. 6, Book 60, Hadith 283
Arabic reference: Book 65, Hadith 4760