The Sufficient (Vol 2) · Hadith 749 (#Ḥadīth #2)
Chapter 88 | To Show Kindness to and Honor a Believer
2ـ عَنْهُ عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ عُمَرَ بْنِ عَبْدِ الْعَزِيزِ عَنْ جَمِيلِ بْنِ دَرَّاجٍ عَنْ أَبِي عَبْدِ الله (عَلَيهِ السَّلام) قَالَ مَنْ قَالَ لأخِيهِ الْمُؤْمِنِ مَرْحَباً كَتَبَ الله تَعَالَى لَهُ مَرْحَباً إِلَى يَوْمِ الْقِيَامَةِ.
2. It is narrated from him (narrator of the Hadith above) from Ahmad ibn Muhammad from ‘Umar ibn ‘Abd al-‘Aziz from Jamil ibn Darraj from Abu ‘Abdillah who has said the following: “Whoever says ‘Welcome’ to his brother (in belief) Allah then writes down for him ‘Welcome’ up to the Day of Judgment.”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).