[24].Surah An-Nur [The Light]: Ayat 3

৩. ব্যভিচারী ব্যভিচারিনীকে অথবা মুশরিক নারীকে ব্যতীত বিবাহ করেনা এবং ব্যভিচারিনী তাহাকে ব্যভিচারী অথবা মুশরিক ব্যতীত কেহ বিবাহ করেনা, মু’মিনদের জন্য ইহা নিষিদ্ধ করা হইয়াছে।

Ayat 3. The adulterer marries not but an adulteress or a Mushrikah and the adulteress none marries her except an adulterer or a Muskrik [and that means that the man who agrees to marry (have a illegal relation with) a Mushrikah (female polytheist, pagan or idolatress) or a prostitute, then surely he is either an adulterer, or a Mushrik (polytheist, pagan or idolater, etc.) And the woman who agrees to marry (have a sexual relation with) a Mushrik (polytheist, pagan or idolater) or an adulterer, then she is either a prostitute or a Mushrikah (female polytheist, pagan, or idolatress, etc.)]. Such a thing is forbidden to the believers (of Islamic Monotheism). 

[Tafseer] of ayat 3. Let no man guilty of adultery or fornication marry and but a woman similarly guilty, or an Unbeliever: nor let any but such a man or an Unbeliever marry such a woman: to the Believers such a thing is forbidden. Islam commands sex purity, for men and for women, at all times—before marriage, during marriage, and after the dissolution of marriage. Those guilty of illicit practices are shut out of the marriage circle of chaste men and women. 

Hazrat Abu Musa Al-Ash`ari (May Allah be pleased with him) reported: The The Messenger of Allah [SAWW](PBUH)said, "A person will be summoned with the one whom he loves".

[Al-Bukhari Book 08, Chapter 73, Hadith # 191].

Another narration is: The Messenger of Allah [SAWW](PBUH) was asked; "What about a person who loves a people but cannot be with them?'' (i.e., either he cannot attain their lofty position of righteousness or that he has not met with them in this life). The Messenger of Allah [SAWW](PBUH) replied, "A person will be in the company of those whom he loves".

Lesson : as mentioned above in Surah An-Nur Ayat 03."Such a thing is forbidden to the believers" Besides bringing to eminence the high merit of entertaining the love for the pious persons, this Hadith tells us about the Mercy and Blessings of Allah which He will shower upon those who love the pious people. Because of this love, Allah will elevate even the inferior people and include them among those whom He loves. This Hadith also serves a warning that association and love with the impious people is extremely dangerous as one can meet the same bad end which is inevitable for them. May Allah save us from it.