Nikāḥu’l-Mut‘ah,(Arabic: نكاح المتعة, also Nikah Mut‘ah literally, marriage[1] for pleasure[2]), or sigheh, is a time-delimited marriage contract according to the Usuli Shia schools of Shari‘a (Islamic law). The duration of this type of marriage is fixed at its inception and is then automatically dissolved upon completion of its term.

There is plenty more if you follow the link:

http://en.wikipedia.org/wiki/Nikah_Mut%27ah

Last I checked, only strict Catholics follow the "Death do us part bit". All other faiths allow divorce.