The Sufficient (Vol 2) · Hadith 2198 (#Ḥadīth #3)
Chapter 9 | Offer or Answer of Greetings of Peace by one Person From a Group Is Sufficient
3ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ مُحَمَّدِ بْنِ يَحْيَى عَنْ غِيَاثِ بْنِ إِبْرَاهِيمَ عَنْ أَبِي عَبْدِ الله (عَلَيهِ السَّلام) قَالَ إِذَا سَلَّمَ مِنَ الْقَوْمِ وَاحِدٌ أَجْزَأَ عَنْهُمْ وَإِذَا رَدَّ وَاحِدٌ أَجْزَأَ عَنْهُمْ.
3. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Muhammad ibn Yahya from Ghiyath ibn Ibrahim from Abu ‘Abdillah who has said the following from the Imam: “If one person from a group offers the greeting of peace it is sufficient for all and so also is for an answer if only one person from the stationary group responds.”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).