Al-Kāfi - Volume 1 > Tacit and Explicit Testimony as proof of al-Hassan ibn Ali’s (a.s.) (a.s.) Divine Authority over the people after Amir al-Mu’minin Ali (a.s.)
Hadith #5

5ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ الْحُسَيْنِ بْنِ سَعِيدٍ عَنْ حَمَّادِ بْنِ عِيسَى عَنْ عَمْرِو بْنِ شِمْرٍ عَنْ جَابِرٍ عَنْ ابي جعفر (عَلَيْهِ السَّلام) قَالَ أَوْصَى أَمِيرُ الْمُؤْمِنِينَ (عَلَيْهِ السَّلام) إِلَى الْحَسَنِ وَأَشْهَدَ عَلَى وَصِيَّتِهِ الْحُسَيْنَ (عَلَيْهِ السَّلام) وَمُحَمَّداً وَجَمِيعَ وُلْدِهِ وَرُؤَسَاءَ شِيعَتِهِ وَأَهْلَ بَيْتِهِ ثُمَّ دَفَعَ إِلَيْهِ الْكِتَابَ وَالسِّلاحَ ثُمَّ قَالَ لابْنِهِ الْحَسَنِ يَا بُنَيَّ أَمَرَنِي رَسُولُ الله أَنْ أُوصِيَ إِلَيْكَ وَأَنْ أَدْفَعَ إِلَيْكَ كُتُبِي وَسِلاحِي كَمَا أَوْصَى إِلَيَّ رَسُولُ الله وَدَفَعَ إِلَيَّ كُتُبَهُ وَسِلاحَهُ وَأَمَرَنِي أَنْ آمُرَكَ إِذَا حَضَرَكَ الْمَوْتُ أَنْ تَدْفَعَهُ إِلَى أَخِيكَ الْحُسَيْنِ ثُمَّ أَقْبَلَ عَلَى ابْنِهِ الْحُسَيْنِ وَقَالَ أَمَرَكَ رَسُولُ الله (صَلَّى اللهُ عَلَيْهِ وَآلِه) أَنْ تَدْفَعَهُ إِلَى ابْنِكَ هَذَا ثُمَّ أَخَذَ بِيَدِ ابْنِ ابْنِهِ عَلِيِّ بْنِ الْحُسَيْنِ ثُمَّ قَالَ لِعَلِيِّ بْنِ الْحُسَيْنِ يَا بُنَيَّ وَأَمَرَكَ رَسُولُ الله (صَلَّى اللهُ عَلَيْهِ وَآلِه) أَنْ تَدْفَعَهُ إِلَى ابْنِكَ مُحَمَّدِ بْنِ عَلِيٍّ وَأَقْرِئْهُ مِنْ رَسُولِ الله (صَلَّى اللهُ عَلَيْهِ وَآلِه) وَمِنِّي السَّلامَ ثُمَّ أَقْبَلَ عَلَى ابْنِهِ الْحَسَنِ فَقَالَ يَا بُنَيَّ أَنْتَ وَلِيُّ الامْرِ وَوَلِيُّ الدَّمِ فَإِنْ عَفَوْتَ فَلَكَ وَإِنْ قَتَلْتَ فَضَرْبَةٌ مَكَانَ ضَرْبَةٍ وَلا تَأْثَمْ.

5. A number of our people has narrated from Ahmad ibn Muhammad from al-Husayn ibn Sa‘id from Hammad ibn ‘Isa from ‘Amr ibn Shimr from Jabur from abu Ja‘far (a.s.) who has said the following. “Amir al-Mu’minin Ali (a.s.) made his directive will to al-Hassan (a.s.) and asked al-Husayn (a.s.), Muhammad, all his sons, the leaders among his followers and the whole of his family to bear testimony. He then delivered to him the Book and the Armament. He then said to his son, al-Hassan (a.s.), “My son, the Messenger of Allah commanded me to entrust you with my directive will. (He commanded me) to deliver to you my books, and my armament just as the Messenger of Allah entrusted me with his directive will and delivered his books and armament to me. He commanded me to command you to deliver them all to your brother, al-Husayn (a.s.) when time for you to leave this world will come. Then he turned to his son, al-Husayn (a.s.) and said, “the Messenger of Allah has commanded you to deliver it all to your son, this one. He then held with his hand Ali ibn al-Husayn (a.s.) and said to him, “My son, the Messenger of Allah has commanded you to deliver it all to your son, Muhammad ibn Ali (a.s.) and convey to him the Islamic greeting of the Messenger of Allah and my Islamic greeting.” He then turned to his son, al-Hassan (a.s.) and said, “My son, you are the Leader with Divine Authority and the authority in the matter of the spilled blood. Were you to forgive it would be for you. Were you to retaliate then one strike for an strike you would not be in sin.”