Hadith no.29: The Prophet and the Wilayat of 'Ali
عَنْ أَبِي سَعِيدٍ قَالَ: لَمَّا كَانَ يَوْمُ غَدِيرِ خُمٍّ أَمَرَ رَسُولُ اللٌّهِمُنَادِيًا فَنَادى: أَلصَّلوٌةُ جَامِعَةٌ، فَأَخَذَ بِيَدِ عَلِيٍّوَ قَالَ: أَللٌّهُمَّ مَنْ كُنْتُ مَوْلاَهُ فَعَلِيٌّ مَوْلاَهُ، أَللٌّهُمَّ وَالِ مَنْ وَالاَهُ، وَ عَادِ مَنْ عَادَاهُ
It has been narrated from Abi Sa'id that: “When the day of Ghadir Khumm came, the Messenger of Allah (blessings of Allah be upon him and his family) commanded the caller to call out, ‘Gather for the Salat. Then he took 'Ali (peace be upon him) by the hand and said, ‘O’ Allah! Whomsoever I am his master, this 'Ali is also his master. O’ Allah! Be a friend to that person who is a friend to him, and be an enemy to that person who is an enemy to him.’”
Biharul Anwar, Volume 37, Page 112, Hadith 4

Hadith no.30: Living the Life of a Prophet
قَالَ رَسُولُ اللٌّه:ِمَنْ يَرِيدُ أَنْ يَحْـيـى حَيَاتِي، وَ يَمُوتَ مَمَاتِي، وَيَسْكُنَ جَنَّةَ الْخُلْدِ الَّتِي وَعَدَنِي رَبِّي‏ فَلْيَتَوَلَّ عَلِيَّ ابْنَ أَبِي طَالِبٍفَإِنَّهُ لَنْ يُّخْرِجَكُمْ مِنْ هُدىً، وَلَنْ يَّدْخِلَكُمْ فِي ضَلاَلَةٍ
The Messenger of Allah (blessings of Allah be upon him and his family) has said: “A person who wishes to live the life that I lived and wishes to die the way I die, and wants to reside in the perpetual Paradise which has been promised to me by my Lord should accept the Wilayat of 'Ali ibn Abi Talib (peace be upon him), because he will never drag you away from the path of true guidance and he will never misguide you.”
Al-Ghadir, Volume 10, Page 278

Hadith no.31: The Prophet and the Imamate of 'Ali
عَنْ جَابِرِ بْنِ عَبْدِ اللٌّهِ الأَنْصَارِيِ قَالَ: سَمِعْتُ ‏َرَسُولَ اللٌّهَيَقُولُ لِعَلِيِّ بْنِ أَبِي طَالِبٍيَا عَلِيُّ! أَنْتَ أَخِي وَ وَصِيِّي وَ وَارِثِي‏ وَخَلِيفَتِي عَلى ‏أُمَّتِي فِي‏ حَيٌوتِي وَ بَعْدَ وَفَاتِي‏. مُحِبُّكَ مُحِبِّي وَ مُبْغِضُكَ مُبْغِضِي ‏َو عَدُوُّكَ عَدُوِّي
It has been narrated from Jabir ibn 'Abdullah al-Ansari that: “I heard the Messenger of Allah (blessings of Allah be upon him and his family) say to 'Ali ibn Abi Talib (peace be upon him): ‘O’ 'Ali! You are my brother and my successor and my executor and my caliph over my nation both during my life and also after my death. Those who love you, love me; and those who hate you, hate me; and your enemy is my enemy.”
Al-Amali of as-Saduq, Page 124, Hadith 5

Hadith no.32: The Pillars of Islam
عَنْ أَبِي جَعْفَرٍقَالَ: بُنِيَ الإِسْلاَمُ عَلى خَمْسٍ: أَلصَّلٌوةُ وَ الزَّكٌوةُ وَ الصَّوْمُ وَ الْحَجُّ وَ الْوِلاَيَةُ ‏َوَ لَمْ يُنَادَ بِشَيْ‏ءٍ مَا نُوْدِيَ بِالْوِلاَيَةِ يَومَ الْغَدِير
It has been narrated form Abi Ja'far [Imam Muhammad ibn 'Ali al-Baqir] (peace be upon him) that: “Islam is built on five foundations: Salat, Zakat, Sawm, Hajj and Wilayat – and there was no call to any of these resembling that which the people were called towards in order to accept the Wilayah on the Day of Ghadir.”
Al-Kafi, Volume 2, Page 21, Hadith 8

Hadith no.33: The Perpetual Wilayat
عَنْ أَبِي الْحَسَنِقَالَ: وِلاَيَةُ عَلِيٍّمَكْتُوبَةٌ فِي صُحُفِ جَمِيعِ الأَنْبِيَآءِ وَ لَنْ يَّـبْعَثَ ‏اللٌّهُ رَسُولاً إِلاَّ بِنُبُوَّةِ مُحَمَّدٍ وَوَصِيَّةِ عَلِيٍّ
It has been narrated from Abil Hasan ['Ali ibn Musa al-Ridha] (peace be upon him) that: “The Wilayat of 'Ali (peace be upon him) has been written in all of the books of the (previous) Prophets and Allah did not appoint a single Messenger except with a (pledge to the) Prophethood of Muhammad and the successorship of 'Ali (peace be upon him).”
Safinatul Bihar, Volume 2, Page 691

Hadith no.34: Wilayat and Tawhid
قَالَ رَسُولُ اللٌّهِ : وِلاَيَةُ عَلِيِّ بْنِ أَبِي طَالِبٍ وِلاَيَةُ اللٌّهِ ‏َوَ حُبُّهُ عِبَادَةُ اللٌّهِ وَ اتِّبَاعُهُ فَرِيضَةُ اللٌّهِ ‏َوَ أَوْلِيَاؤُهُ أَوْلِيَاءُ اللٌّهِ وَ أَعْدَاؤُهُ أَعْدَاءُ اللٌّهِ ‏َوَ حَرْبُهُ حَرْبُ اللٌّهِ وَ سِلْمُهُ سِلْمُ اللٌّهِ عَزَّ وَ جَلَّ
The Messenger of Allah (blessings of Allah be upon him and his family) has said, “The Wilayat of 'Ali ibn Abi Talib is the Wilayat of Allah; love for him ('Ali) is worship of Allah; following him ('Ali) is an obligatory act from Allah; his friends are the friends of Allah and his enemies are the enemies of Allah; fighting with him is (like) fighting against Allah; and making peace with him is (like) making peace with Allah, the Noble and Grand.”
Al-Amali of as-Saduq, Page 32

Hadith no.35: The Day of the Cry of Despair of Shaitan
عَنْ جَعْفَرٍ عَنْ أَبِيهِقَالَ: إِنَّ إِبْلِيسَ عَدُوَّ اللٌّهِ رَنَّ أَرْبَعَ رَنَّاتٍ: يَوْمَ لُعِنَ، وَ يَوْمَ أُهْبِطَ إلـى الأَرْضِ، وَ يَوْمَ بُعِثَ النَّبِيُّوَ يَوْمَ الْغَدِيرِ
It has been narrated from Ja'far [Imam Ja'far ibn Muhammad as-Sadiq] (peace be upon him) from his father [Imam Muhammad ibn 'Ali al-Baqir] (peace be upon him) that: “Iblis, the enemy of Allah, cried out (in hopelessness) four times: The day when he was cursed (by Allah); the day when he was sent down to the Earth; the day when the Prophet (blessings of Allah be upon him and his family) was officially appointed (to convey the message on Earth); and on the Day of Ghadir.”
Qurbul Isnad, Page 10

Hadith no. 36: The Wilayatof 'Ali is the Fortress of Tawhid
عَنِ النَّبِيّ:ِ يَقُولُ اللٌّهُ تَبَارَكَ وَ تَعَالـى: وِلاَيَةُ عَلِيِّ بْنِ أَبِي طَالِبٍ حِصْنِي، فَمَنْ دَخَلَ حِصْنِي أَمِنَ مِنْ نَارِي
It has been narrated from the Prophet (blessings of Allah be upon him and his family) that: “Allah, the Glorious and High, has said, “The Wilayat of 'Ali ibn Abi Talib is My fortress, so whoever enters into My fortress will be protected from My fire.”
Jami' al-Akhbar, Page 52, Hadith 7

Hadith no.37: The Successor of the Prophet
قَالَ رَسُولُ اللٌّه:ِيَا عَلِيُّ أَنَا مَدِينَةُ الْعِلْمِ وَ أَنْتَ بَابُهَا وَ لَنْ تُؤْتَى الْمَدِينَةَ إِلاَّ مِنْ قِبَلِ الْبَابِ ... أَنْتَ إِمَامُ أُمَّتِي وَ خَلِيفَتِي عَلَيْهَا بَعْدِي، سَعِدَ مَنْ أَطَاعَكَ وَ شَقِي مَنْ عَصَاكَ، وَ رَبِحَ مَنْ تَوَلاَّكَ وَ خَسِرَ مَنْ عَادَاكَ
The Messenger of Allah (blessings of Allah be upon him and his family) has said, “O’ 'Ali! I am the city of knowledge and you are its gate and no one can enter into the city except by going through its gate … You are the Imam of my nation and you are my successor. Blessed is the person who obeys you and depraved is the person who disobeys you. One who follows you will succeed, while the one who turns away from you will be in a loss.”
Jami' al-Akhbar, Page 52, Hadith 9

Hadith no.38: Islam in the Shadow of Wilayat
قَالَ الصَّادِقُ:أَثَافـى الإِسْلاَمُ ثَلاَثَةٌ: أَلصَّلوٌةُ وَ الزَّكوٌةُ وَ الْوِلاَيَةُ، لاَ تَصِحُّ وَاحِدَةٌ مِنْهُنَّ إِلاَّ بِصَاحِـبَتَيْهَا
Imam as-Sadiq [Ja'far ibn Muhammad] (peace be upon him) has said: “The fundamental pillars of Islam are three: Salat, Zakat and Wilayat. No one of these will be valid unless accompanied by the other two.”
Al-Kafi, Volume 2, Page 18

Hadith no.39: A Thousand Witnesses
قَالَ أَبُو عَبْدِ اللٌّهِأَلْعَجَبُ يَا حَفْصَ لِمَا لَقِيَ عَلِيَِ بْنَ أَبِى‏طَالِبٍ!! أَنَّهُ كَانَ لَهُ عَشْرَةَ الأَلْفِ شَاهِداً لَمْ يَقْدِرْ عَلى أَخْذِ حَقِّهِ وَ الرَّجُلُ يَأْخُذُ حَقَّهُ بِشَاهِدَينِ
Abu 'Abdillah [Imam Ja'far ibn Muhammad as-Sadiq] (peace be upon him) has said, “O’ Hafsa! I am surprised at what happened to 'Ali ibn Abi Talib!! Despite having tens of thousands of witnesses he could not claim his right when in reality a person needs only two witnesses to claim what is rightfully his!”
Biharul Anwar, Volume 37, Page 140

Hadith no.40: 'Ali , The Commentator of the Qur'an
عَنِ النَّبِيِّ فِي إِحْتِجَاجِهِ يَوْمَ الْغَدِيرِ: عَلى تَفْسِيرُ كِتَابِ اللٌّهِ، وَ الدَّاعِيَ إِلَيهِ، أَلاَ وَ إِنَّ الْحَلاَلَ وَ الْحَرَامَ أَكْثَرُ مِنْ أَنْ أُحْصِيَهُمَا وَ أُعَرِّفَهُمَا، فَآمُرُ بِالْحَلاَلِ وَ أَنْهى عَنِ الْحَرَامِ فِي مَقَامٍ وَاحِدٍ، فَأُمِرْتُ أَنْ آخُذَ الْبَيْعَةَ عَلَيْكُمْ وَ الصَّفْقَةَ مِنْكُمْ، بِقُـبُولِ مَا جِئْتُ بِهِ عَنِ اللٌّهِ عَزَّ وَ جَلَّ فِي عَلِيٍّ أَمِيـرِ الْمُؤْمِنِينَ وَ الأَئِمَّةِ مِنْ بَعْدِهِ. مَعَاشِرَ النَّاسِ تَدَبَّرُوا وَ افْهَمُوا آيَاتِهِ، وَ انْظُرُوا فِي مُحْكَمَاتِهِ وَ لاَ تَتَّبِعُوا مُتَشَابِهَهُ، فَوَ اللٌّهِ لَنْ يُبَيِّنَ لَكُمْ زَوَاجِرَهُ، وَ لاَ يُوْضَـعُ لَكُمْ عَنْ تَفْسِيـرِهِ إِلاَّ الَّذِي أَنَا آخُذُ بِيَدِهِ.
From the Prophet (blessings of Allah be upon him and his family), in his address on the Day of Ghadir: “'Ali is the exegesis (Tafsir) of the book of Allah and the one who calls others to it. Verily, that which is permitted and forbidden is more than what I can explain to you; what I command you as permitted and forbid you as prohibited, is all from one position.
I was commanded to take your allegiance and your pledge to accept what I brought from Allah, the Exalted, regarding 'Ali, the commander of the believers, and the Imams after him. O’ People! Ponder and understand the verses (of the Qur'an), observe those that are clear and do not follow those that are unclear; for by Allah no one can explain to you its limitations or clarify its meanings except the one whose hand I am holding (meaning Imam 'Ali).”
Wasa'il ash-Shi'a, Volume 18, Page 142, Hadith43