The Complete Pilgrimage Guide · Hadith 176 (#Ḥadīth #15)

15- حَدَّثَنِي أَبِي (رحمه الله) وَ جَمَاعَةُ مَشَايِخِي عَنْ سَعْدِ بْنِ عَبْدِ اللَّهِ عَنْ عَلِيِّ بْنِ إِسْمَاعِيلَ بْنِ عِيسَى وَ مُحَمَّدِ بْنِ الْحُسَيْنِ بْنِ أَبِي الْخَطَّابِ عَنْ مُحَمَّدِ بْنِ عَمْرِو بْنِ سَعِيدٍ الزَّيَّاتِ عَنْ عَبْدِ اللَّهِ بْنِ بُكَيْرٍ عَنْ زُرَارَةَ عَنْ أَبِي جَعْفَرٍ (عَلَيْهِ ٱلسَّلَامُ) قَالَ كَتَبَ الْحُسَيْنُ بْنُ عَلِيٍّ مِنْ مَكَّةَ إِلَى مُحَمَّدِ بْنِ عَلِيٍّ بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ مِنَ الْحُسَيْنِ بْنِ عَلِيٍّ إِلَى مُحَمَّدِ بْنِ عَلِيٍّ وَ مَنْ قِبَلَهُ مِنْ بَنِي هَاشِمٍ أَمَّا بَعْدُ فَإِنَّ مَنْ لَحِقَ بِي اسْتُشْهِدَ وَ مَنْ لَمْ يَلْحَقْ بِي لَمْ يُدْرِكِ الْفَتْحَ وَ السَّلَامُ

15. My father and all of my teachers narrated to me from Sa’d b. Abdillah from Ali b. Isma'il b. ‘Isa and from Muhammad b. al-Husayn b. Abil Khattab from Muhammad b. Amru b. Sa'eed al-Zayyat from Abdillah b. Bukayr from Zurarah from Abu Ja’far who said: Husayn b. Ali wrote a letter in Makkah to Muhammad b. Ali (i.e., al-Hanafiyyah) which read: "In the name of Allah, Most Gracious, Most Merciful, from al-Husayn b. Ali to Muhammad b. Ali and to those with him from among the Bani Hashim: Verily those who join me will be martyred and those who stay behind will not achieve victory - wasalam (and peace)."

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).