Quranists, unlike Sunnis and Shias, have very strict rules with regard to polygamy (having multiple wives). Some Quranist movements allow polygamy only on the condition of the adoption of orphans who have mothers and do not want to lose them, but other Quranist movements argue that although it is not explicitly banned, polygamy is a thing of the past because the regulations which are contained in the Quran are very strict and they have been fulfilled by almost nobody on Earth, therefore polygamy cannot be practiced anymore. In the extremely rare case in which it may be practiced, there is a strict limit on the number of wives, which is four.[30][67][3]