Sharia
A Muslim man may be married to up to four women at a time, although the Qur'an has emphasised that this is a permission, and not a rule. The Qur'an has stated that to marry one is best if you fear you cannot do justice between your wives and respective families. This means that he must be able to house each wife and her children in a different house, he should not give preferential treatment to one wife over another.