Not typically. A will is a legal document dealing with the transfer of assets after your death. As such, it is nowadays rare for a person to express religious sentiments within a will. That being said, historically, wills often used religious wording. Also, sometimes a person will indicate in a will that he or she wishes to have a particular form of religious funeral. In some cases, a person contesting a will indicate that he or she wishes for children to be placed with particular guardians, and the motivation for this may be religious in nature. As well, sometimes people will leave gifts to religious charities.