And if the voluntary acts are as high as their obligatory duties, which are their foundations, then the highest voluntary acts of excellence in good deeds are fasting, because its obligation is fasting in Ramadan, and Ramadan is the name of God, and fasting is an act of worship without equal, and there is nothing like it, so the virtue of all the voluntary acts of worship is forbidden from marriage, so it has an effect in it, that is, in preventing it. And whoever has the power to prevent, then the forbidden is characterized by weakness in relation to that power. If the forbidden has such power that it affects the place of this worship until it removes its ruling, it is undoubtedly stronger, so voluntary marriage is stronger because of the effect it has in invalidating fasting, prayer, etc.