Treat each wife equally and fairly without showing any favoritism or partiality in marriage .

This hadith warns men who have two wives not to show favoritism towards one wife over the other. If a man is inclined to one wife, he will be punished on the Day of Resurrection with a side hanging down. This means that he will suffer physical pain and humiliation in front of everyone else. It is important for men with multiple wives to treat each wife equally and fairly, as this hadith shows that God does not approve of favoritism or partiality in marriage. Men should also remember that they are accountable for their actions on the Day of Judgment, so it is important for them to act according to God's commands at all times.