Sahih Muslim Book 42, Hadith Number 7070.

Chapter : Not known.

Abu Huraira reported Allah’s Messenger (may peace be upon him) as saying: Look at those who stand at a lower level than you but don’t look at those who stand at a higher level than you, for this would make the favours (conferred upon you by Allah) insignificant(in your eyes). Abu Mu’awiya said: Upon you.