Say Alhumdulilah after a person has sneezed; Respond with Yarhmaukallah if you hear someone else saying Alhumdulilah after a sneeze; Try your best not to yield into temptation by restraining yourself from yawning; Practice good manners in all aspects of life

This hadith teaches us the etiquette of sneezing and yawning. When we sneeze, we should say "Al-Hamdu Lillah" which means "Praise be to Allah". It is then obligatory for every Muslim who hears us to respond with "Yarhamuk-Allah" which means "May Allah have mercy on you". On the other hand, yawning is from the devil so we should try our best to restrain ourselves from doing so. Whenever we feel like yawning, we must remember that the devil laughs at us when we do so. Therefore, this hadith encourages us to practice good manners in all aspects of our lives including how we react when someone sneezes or how much control do we have over ourselves when feeling like yawning.