Question: Please let me know about the concept of Mut`a. Is it allowed in Islam? 
    Answer: Mut'a means marriage up to a predetermined period of time. Some of the Shia sects like the Imamiyah sect allow it (Fiqh al-Sunnah, Syed Sabiq, Vol, 2 Pg 167). They base their view on the Qur'anic verse (5:24), which, I am afraid, is erroneously translated. 
    The Qur’an explicitly prohibits such a relationship. 
    According to the Qur’an one can have a sexual relationship only with a woman who is his wife out of permanent wedlock. 
    Also, it is known that the institution of slavery existed in the times of the Prophet (sws). Islam chalked out a complete programme for the eradication of this evil from the society. However, since it was deeply rooted in the society, a gradual scheme of its elimination was adopted. During this interim period, when slavery was not completely prohibited, sexual relations with slave girls was allowed as well. The Qur'an says: 

And those who guard their chastity except with their wives and slave girls. For they are not to be blamed [in these cases]. But those who exceed beyond this are transgressors." (70:29-31)