Learn three things from the Prophet Muhammad; Respect other people's privacy; Pray Witr before sleeping; Strive for knowledge; Have good manners/etiquette when dealing with others .

This hadith is about the advice given by Umar ibn al Khattab to Al Ash'ath bin Qais. He told him that he should learn three things from the Prophet Muhammad (peace be upon him). The first thing was not to ask a man why he hit his wife. This teaches us that it is wrong for us to interfere in other people's personal matters and we should respect their privacy. The second thing was that one should always pray Witr before going to sleep as this is an important part of our faith and worship of Allah. The third thing was forgotten but it could have been something related to good manners or etiquette when dealing with others. We can also learn from this hadith that we should always strive for knowledge and try our best not forget what we have learned so that we can benefit from it in our lives.