Chapter on Rules of Janabah and Methods of Purification
Tahdhīb al-Aḥkām|Volume 1|Book 1|Chapter 6
وَبِهَذَا اَلْإِسْنَادِ عَنْ مُحَمَّدِ بْنِ يَعْقُوبَ عَنْ عِدَّةٍ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ عِيسَى عَنْ مُحَمَّدِ بْنِ إِسْمَاعِيلَ قَالَ: سَأَلْتُ اَلرِّضَا عَلَيْهِ اَلسَّلاَمُ عَنِ اَلرَّجُلِ يُجَامِعُ اَلْمَرْأَةَ قَرِيباً مِنَ اَلْفَرْجِ فَلاَ يُنْزِلاَنِ مَتَى يَجِبُ اَلْغُسْلُ فَقَالَ« إِذَا اِلْتَقَى اَلْخِتَانَانِ فَقَدْ وَجَبَ اَلْغُسْلُ» قُلْتُ اِلْتِقَاءُ اَلْخِتَانَيْنِ هُوَ غَيْبُوبَةُ اَلْحَشَفَةِ قَالَ« نَعَمْ».
Through this chain of narration, from Muhammad ibn Ya’qub, from a group of our companions, from Ahmad ibn Muhammad ibn Isa, from Muhammad ibn Isma’il, who said:
I asked al-Ridha عليه السلام about a man who engages in sexual activity with a woman near the private area, but neither of them ejaculates. When does ghusl become obligatory? Imam عليه السلام said: "When the two circumcised parts meet, ghusl becomes obligatory." I said: "Does the meeting of the two circumcised parts mean the penetration of the glans (into the private area)?" Imam عليه السلام replied: "Yes."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 1, p. 124
- Ṣaḥīḥ al-Tahdhīb