كتاب اللباس
Read the English translation first, with the original Arabic directly underneath.
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.
بَيْنَمَا رَجُلٌ يَمْشِي فِي حُلَّةٍ، تُعْجِبُهُ نَفْسُهُ مُرَجِّلٌ جُمَّتَهُ، إِذْ خَسَفَ اللَّهُ بِهِ، فَهْوَ يَتَجَلَّلُ إِلَى يَوْمِ الْقِيَامَةِ