The Sufficient (Vol 3) · Hadith 908 (#Ḥadīth #2)
Chapter 90 | About the Spirits (Souls) of the Believers
2ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ عَنِ الْحَسَنِ بْنِ عَلِيٍّ عَنْ أَحْمَدَ بْنِ عُمَرَ رَفَعَهُ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلام) قَالَ قُلْتُ لَهُ إِنَّ أَخِي بِبَغْدَادَ وَأَخَافُ أَنْ يَمُوتَ بِهَا فَقَالَ مَا تُبَالِي حَيْثُمَا مَاتَ أَمَا إِنَّهُ لاَ يَبْقَى مُؤْمِنٌ فِي شَرْقِ الأرْضِ وَغَرْبِهَا إِلاَّ حَشَرَ الله رُوحَهُ إِلَى وَادِي السَّلاَمِ قُلْتُ لَهُ وَأَيْنَ وَادِي السَّلاَمِ قَالَ ظَهْرُ الْكُوفَةِ أَمَا إِنِّي كَأَنِّي بِهِمْ حَلَقٌ حَلَقٌ قُعُودٌ يَتَحَدَّثُونَ.
2. A number of our people have narrated from Sahl ibn Ziyad from al-Hassan ibn Ali from Ahmad ibn ‘Umar in marfu‘ manner from abu ‘Abd Allah, the following: “I said to abu ‘Abd Allah , ‘My brother is in Baghdad and I am afraid that he may die there.’ He said, ‘Why should you worry about wherever he dies? Indeed, Allah sends to Wadi al- Salam the soul of every believing person who dies in the east or west of the earth.’ I then asked, ‘Where is Wadi al-Salam?’ ‘It is behind the city of Kufah,’ He (the Imam) replied. ‘It is as if I see them in circles and circles, sitting and talking to each other,’ the Imam explained.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).