Sahih Muslim Book 24, Hadith Number 5203.

Chapter : It is forbidden to walk with pride, over pleased with fine clothes.

Abu Huraira reported that Allah’s Messenger (may peace be upon him) said that there was a person who used to walk with pride because of his thick hair and fine mantles. He was made to sink in the earth and he would go on sinking in the earth until the Last Hour would come.