Chapter on Rules of Janabah and Methods of Purification
Tahdhīb al-Aḥkām|Volume 1|Book 1|Chapter 6
أَحْمَدُ بْنُ مُحَمَّدٍ عَنِ اَلْبَرْقِيِّ رَفَعَهُ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ قَالَ:« إِذَا أَتَى اَلرَّجُلُ اَلْمَرْأَةَ فِي دُبُرِهَا فَلَمْ يُنْزِلْ فَلاَ غُسْلَ عَلَيْهِمَا فَإِنْ أَنْزَلَ فَعَلَيْهِ اَلْغُسْلُ وَ لاَ غُسْلَ عَلَيْهَا».
Ahmad ibn Muhammad, from al-Barqi, mentioned (a narration) to Abu Abdullah عليه السلام, who then commented: "If a man approaches a woman through her rear and does not ejaculate, then ghusl is not required for either of them. However, if he ejaculates, ghusl is obligatory on him but not on her."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 131
- Ṣaḥīḥ al-Tahdhīb