Sahih Muslim
The Book Pertaining to Clothes and Decoration (Kitab Al-Libas wal-Zinah)
Book Number: 024 / Hadith Number: 5205
Abu Huraira reported Allah's Messenger (may peace be upon him) as saying: There was a person who walked with pride because of his (fine) mantles and well pleased with his personality. Allah made him sink in the earth and he would go on sinking in that until the Day of Resurrection.