The Sufficient (Vol 3) · Hadith 221 (#Ḥadīth #4)
Chapter 30 | Reason Necessitating Ghusl (bath) for Men and Women
4ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ حَمَّادِ بْنِ عُثْمَانَ عَنْ عُبَيْدِ الله الْحَلَبِيِّ قَالَ سَأَلْتُ أَبَا عَبْدِ الله (عَلَيْهِ الْسَّلام) عَنِ الْمُفَخِّذِ عَلَيْهِ غُسْلٌ قَالَ نَعَمْ إِذَا أَنْزَلَ.
4. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from Hammad ibn ‘Uthman from ‘Ubayd Allah al-Halabiy who has said the following: “I once asked abu ‘Abd Allah, Alayhi al-Salam, about one’s foreplay and Ghusl (bath). He (the Imam) said, ‘There is Ghusl (bath) obligatory if semen discharge takes place.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).