The Sufficient (Vol 2) · Hadith 2334 (#Ḥadīth #5)
Chapter 29 | No name
5ـ عَنْهُ عَنْ عُثْمَانَ بْنِ عِيسَى عَنْ سَمَاعَةَ قَالَ سَأَلْتُ أَبَا عَبْدِ الله (عَلَيهِ السَّلام) عَنِ الرَّجُلِ يَبْدَأُ بِالرَّجُلِ فِي الْكِتَابِ قَالَ لا بَأْسَ بِهِ ذَلِكَ مِنَ الْفَضْلِ يَبْدَأُ الرَّجُلُ بِأَخِيهِ يُكْرِمُهُ.
5. It is narrated from him (narrator of the Hadith above) from ‘Uthman ibn ‘Isa from Sama’a who has said the following: “Once I asked Abu ‘Abdillah about a man who initiates writing to another man. The Imam said, ‘It is not an offense. It is an excellent act when a man initiates honoring his brother (in belief).”’
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).