Sahih Bukhari
Virtues and Merits of the Prophet (pbuh) and his Companions
Volume: 004 / Book Number: 056 / Hadith Number: 692
Narrated Ibn Umar:
The Prophet said, "While a man was walking, dragging his dress with pride, he was caused to be swallowed by the earth and will go on sinking in it till the Day of Resurrection."