Narrated Abdullah ibn Amr ibn al-'As: A man wearing two red garments passed the Prophet ﷺ and gave him a greeting, but he did not respond to his greeting.
The hadith also serves as an example for how we should conduct ourselves in our daily lives; even if someone greets us in a way that does not meet our standards or expectations, we must still remain courteous and polite in our response. We must remember that Allah is watching over all of our actions and words at all times, so it is important for us to always strive for excellence in everything we do.