Sahih Muslim
The Book Giving Description of the Day of Judgement, Paradise and Hell (Kitab Sifat Al-Qiyamah wal Janna wan-Nar)
Book Number: 039 / Hadith Number: 6737
Anas b. Malik reported that a person said: Allah's Messenger, how the non-believers would be made to assemble on the Day of Resurrection (by crawling) on their faces? Thereupon he said: Is He Who is powerfnl to make them walk on their feet is not powerful enough to make them (crawl) upon their faces on the Day of Resurrection? Qatada said: Of conrse, it is so. (He adjured): By the might of our Lord.