Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
hakim:2786al-Ḥusayn b. al-Ḥasan b. Ayyūb > Abū Yaḥyá b. Abū Masarrah > Khallād b. Yaḥyá And ʿAbd al-Ṣamad b. Ḥassān > Sufyān b. Saʿīd > Ḥabīb b. Abū ʿAmrah > Saʿīd b. Jubayr > Ibn ʿAbbās al-Zānī Lā Yankiḥ Illā Zāniyah or Mushrikah al-Nwr 3

[Machine] Indeed, it is not marriage, but rather sexual intercourse. Only a person who commits adultery or practices polytheism engages in it.  

الحاكم:٢٧٨٦أَخْبَرَنَا الْحُسَيْنُ بْنُ الْحَسَنِ بْنِ أَيُّوبَ ثنا أَبُو يَحْيَى بْنُ أَبِي مَسَرَّةَ ثنا خَلَّادُ بْنُ يَحْيَى وَعَبْدُ الصَّمَدِ بْنُ حَسَّانَ قَالَا ثنا سُفْيَانُ بْنُ سَعِيدٍ عَنْ حَبِيبِ بْنِ أَبِي عَمْرَةَ عَنْ سَعِيدِ بْنِ جُبَيْرٍ عَنِ ابْنِ عَبَّاسٍ {الزَّانِي لَا يَنْكِحُ إِلَّا زَانِيَةً أَوْ مُشْرِكَةً} [النور 3] قَالَ

«أَمَا إِنَّهُ لَيْسَ بِالنِّكَاحِ وَلَكِنَّهُ الْجِمَاعُ لَا يَزْنِي بِهَا إِلَّا زَانٍ أَوْ مُشْرِكٌ»  

هَذَا حَدِيثٌ صَحِيحُ الْإِسْنَادِ وَلَمْ يُخَرِّجَاهُ صحيح