Nikah, or nikkah,,'s the contract between a bride and bridegroom and part of an Islamic marriage, a strong covenant (mithaqun Ghalithun) as expressed in Qur'an 4:21. The first part of the marriage ceremony, nikah,'s the signing of the marriage contract itself. Various traditions may differ in how nikah's performed because different groups accept different texts as authoritative. Therefore, Sunnis will tend to accept Bukhari Hadith while Shia will have their own collections, for example Furu al-… (More on Nikah)