The Book Pertaining to Paradise, Its Description, Its Bounties and Its Intimates (Kitab Al-Jannat wa Sifat Na'imiha wa Ahliha)
Muslim :: Book 40 : Hadith 6846
Ibn Abbas reported that he heard Allah's Messenger (may peace be upon him) deliver an address and he was saying that they would meet Allah barefooted, naked and uncircumcised.