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.
bayhaqi:15235Abū ʿAbdullāh al-Ḥāfiẓ And ʾAbū Ṣādiq Muḥammad b. Abū al-Fawāris al-Ṣaydalānī > Abū al-ʿAbbās > al-Aṣam > al-Ḥasan b. ʿAlī b. ʿAffān > Asbāṭ > Muṭarrif > ʿĀmir > Ibn ʿAbbās > al-Fayʾ al-Jimāʿ > al-Shaykh Wakadhalik Qālah Masrūq Wasaʿīd b. Jubayr Wa-al-Shhaʿbī Waghayruhum from al-Mufassirīn > al-Ḥasan al-Fayʾ al-Jimāʿ Faʾin

[Machine] Translation: Good manners during intercourse. If he has an excuse due to illness or imprisonment, he may fulfill it with his tongue.  

البيهقي:١٥٢٣٥وَأَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ وَأَبُو صَادِقٍ مُحَمَّدُ بْنُ أَبِي الْفَوَارِسِ الصَّيْدَلَانِيُّ قَالَا نا أَبُو الْعَبَّاسِ هُوَ الْأَصَمُّ نا الْحَسَنُ بْنُ عَلِيِّ بْنِ عَفَّانَ نا أَسْبَاطٌ عَنْ مُطَرِّفٍ عَنْ عَامِرٍ عَنِ ابْنِ عَبَّاسٍ ؓ قَالَ الْفَيْءُ الْجِمَاعُ قَالَ الشَّيْخُ وَكَذَلِكَ قَالَهُ مَسْرُوقٌ وَسَعِيدُ بْنُ جُبَيْرٍ وَالشَّعْبِيُّ وَغَيْرُهُمْ مِنَ الْمُفَسِّرِينَ وَقَالَ

الْحَسَنُ الْفَيْءُ الْجِمَاعُ فَإِنْ كَانَ لَهُ عُذْرٌ مِنْ مَرَضٍ أَوْ سَجْنٍ أَجْزَأَهُ أَنْ يُفِيءَ بِلِسَانِهِ