Al-Kāfi
Hadith 7492ـ 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 (a.s.) 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.”