Abu Huraira reported Allah's Messenger (ﷺ) 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. (ID)
Reference (ID): Sahih Muslim 2963 c (ID)
In-book reference (ID): Book 55, Hadith 14 (ID)
USC-MSA web (English) reference(deprecated numbering scheme): Book 42, Hadith 7070 (ID)