Abu Dawud
General Behavior
Book Number: 036 / Hadith Number: 4863
Narated By Al-Mustawrid : The Prophet (pbuh) said: If anyone eats once at the cost of a Muslim's honour, Allah will give him a like amount of Jahannam to eat; if anyone clothes himself with a garment at the cost of a Muslim's honour, Allah will clothe him with like amount of Jahannam; and if anyone puts himself in a position of reputation and show Allah will disgrace him with a place of reputation and show on the Day of Resurrection.