From Sahih Bukhari (Hadith 5789):
Narrated Abu Huraira:The Prophet (or 'Abul Qasim) said, "While a man was walking, clad in a two-piece garment and proud of himself with his hair well-combed, suddenly Allah made him sink into the earth and he will go on sinking into it till the Day of Resurrection
Reference: Bukhari 5789