١٥ وَ 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 (ع) 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 scholars narrated to me from Sa’d ibn ‘Abdillāh, from ‘Ali ibn Ismā’ǐl ibn ‘Isā, and from Muĥammad ibn Ĥusain ibn Abil Khaťťāb, from Muĥammad ibn ‘Amr ibn Sa’ǐd Al-Zayyāt, from ‘Abdillāh ibn Bukayr, from Zurārah, who said: Abū Ja’far (Imam Bāqir ) said: Ĥusain ibn ‘Ali  wrote a letter in Makkah to Muĥammad ibn ‘Ali which read: In the name of Allāh, Most Gracious, Most Merciful From Ĥusain ibn ‘Ali to Muĥammad ibn ‘Ali and to those with him from among the Banǐ Hāshim: Verily those who join me will be martyred and those who stay behind will not achieve victory. Wassalām.