In addition to the usual marriage until death or divorce, there is a different fixed-term marriage known as zawāj al-mutʻah ("temporary marriage") permitted only by the Twelver branch of Shia Islam for a pre-fixed period. There is also Nikah Misyar, a non-temporary marriage with the removal of some conditions permitted by some Sunni Muslims, which usually amount to the wife waiving her right to sustenance from her husband.