Sura al-Nūr 24:3

ٱلزَّانِى لَا يَنكِحُ إِلَّا زَانِيَةً أَوْ مُشْرِكَةً وَٱلزَّانِيَةُ لَا يَنكِحُهَآ إِلَّا زَانٍ أَوْ مُشْرِكٌ وَحُرِّمَ ذَٰلِكَ عَلَى ٱلْمُؤْمِنِينَ

al-zānī lā yankiḥu illā zāniyatan aw mushrikatan wa-l-zāniyatu lā yankiḥuhā illā zānin aw mushrikun wa-ḥurrima dhālika ʿalā l-muʾminīna

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.