Al-Kāfi
Hadith 752 4ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ مُحَمَّدِ بْنِ الْحُسَيْنِ عَنْ عَبْدِ الرَّحْمَنِ بْنِ أَبِي نَجْرَانَ عَنْ سُلَيْمَانَ بْنِ جَعْفَرٍ الْجَعْفَرِيِّ عَنْ حَمَّادِ بْنِ عِيسَى عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلام) أَنَّهُ قَالَ لا تَجْتَمِعُ الامَامَةُ فِي أَخَوَيْنِ بَعْدَ الْحَسَنِ وَالْحُسَيْنِ إِنَّمَا هِيَ فِي الاعْقَابِ وَأَعْقَابِ الاعْقَابِ.
4. Muhammad ibn Yahya has narrated from Muhammad ibn al Husayn from ‘Abd al-Rahman ibn abu Najran from Sulayman ibn Ja‘fari from Hammad ibn ‘Isa from abu ‘Abdallah (a.s.) who has said the following. “Imamat (Leadership with Divine Authority) does not take place in two brothers after al-Hassan and al-Husayn (a.s.). It only continues in the descendents of the Imam (a.s.) generation after the generation.”