Narrated Jarir bin `Abdullah:
The Prophet (ﷺ) said, “He who is not merciful to others, will not be treated mercifully.
: Sahih al-Bukhari 6013
: Book 78, Hadith 44
USC-MSA web (English) reference
: Vol. 8, Book 73, Hadith 42
(deprecated numbering scheme)
This is what we need to understand and put into practice. When you are proud enough to be rude to people around you then do not expect your Master to show mercy upon you!! Be it rich or poor everybody deserves the best treatment.