Hadith 1:

لَا يُقَاسُ بِآلِ مُحَمَّدٍ صلى‌ الله‌ عليه‌ وآله مِنْ هَذِه الأُمَّةِ أَحَدٌ ، ولَا يُسَوَّى بِهِمْ مَنْ جَرَتْ نِعْمَتُهُمْ عَلَيْه أَبَداً ، هُمْ أَسَاسُ الدِّينِ وعِمَادُ الْيَقِينِ ، إِلَيْهِمْ يَفِيءُ الْغَالِي وبِهِمْ يُلْحَقُ التَّالِي ، ولَهُمْ خَصَائِصُ حَقِّ الْوِلَايَةِ ، وفِيهِمُ الْوَصِيَّةُ والْوِرَاثَةُ

Imam Ali (عليه السلام) said:

"None in the Islamic Ummah (community) can be compared with the Progeny of Mohammad (صلى الله عليه وآله). The one who was under their blessings cannot be similar to them. They are the foundation of religion and pillar of certainty. Towards them return those who have exceeded (Ghali) and to them meet those who have fallen short. And specifically for them is right of Wilayah (Mastership) and regarding them is the Wasiyyah (will) and inheritance/succession (of the Prophet)."

[Source: Nahjul Balagha, Sermon. 2]

Hadith 2:

Narrated that Imam Jafar Sadiq (عليه السلام) said,

 نحن أهل البيت لا يقاس بنا أحد

"We the Progeny of Mohammad (asws), none can be compared to us"

[Source: Ilal al-Sharae, Vol. 1, Pg. 177]

Hadith 3:

وباسناده عن علي عليه السلام، قال: نحن أهل البيت لا يقاس بنا أحد، فينا نزل القرآن وفينا معدن الرسالة

Narrated that Imam Ali (عليه السلام) said,

"We the AhlulBayt (عليهم السلام), none can be compared to Us. Regarding Us the Quran was revelaed and within Us is the mine/source of Prophethood."

[Source: Uyoon al-Akhbar al-Ridha, Shaikh Sadooq, Vol. 1, Pg. 71]

Hadith 4:

إِسْحَاقُ ، عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ الْأَقْرَعِ ، قَالَ : حَدَّثَنِي أَبُو حَمْزَةَ نُصَيْرٌ الْخَادِمُ ، قَالَ : سَمِعْتُ أَبَا مُحَمَّدٍ عليه‌السلام غَيْرَ مَرَّةٍ يُكَلِّمُ غِلْمَانَهُ بِلُغَاتِهِمْ : تُرْكٍ ، ورُومٍ ، وصَقَالِبَةَ ، فَتَعَجَّبْتُ مِنْ ذلِكَ ، وقُلْتُ : هذَا ولِدَ بِالْمَدِينَةِ ، ولَمْ يَظْهَرْ لِأَحَدٍ حَتّى مَضى أَبُو الْحَسَنِ عليه‌السلام ، ولَارَآهُ أَحَدٌ ، فَكَيْفَ هذَا؟! أُحَدِّثُ نَفْسِي بِذلِكَ ، فَأَقْبَلَ عَلَيَّ ، فَقَالَ : إِنَّ اللهَ ـ تَبَارَكَ وتَعَالى ـ بَيَّنَ حُجَّتَهُ مِنْ سَائِرِ خَلْقِهِ بِكُلِّ شَيْ‌ءٍ ، ويُعْطِيهِ اللُّغَاتِ ، ومَعْرِفَةَ الْأَنْسَابِ والْآجَالِ والْحَوَادِثِ ، ولَوْ لَاذلِكَ لَمْ يَكُنْ بَيْنَ الْحُجَّةِ والْمَحْجُوجِ فَرْقٌ

Narrated by Abu Hamza Nasir al-Khadim that he said,

I heard Imam Hasan al-Askari (عليه السلام) speaking on more than one occasion to his servants in their own languages. Among them were Turks, men from Rome and from Saqaliba. 

I was amazed at that and I said, "This man was born in Medina. He did not show himself to anyone until Abu al-Hasan Imam Naqi (as) died, and no one saw him. How is this?"

While I was saying this to myself, the Imam came to me and said, "Allah (جل ذكره) has separated His proof (Hujjah) from the rest of His creatures and has given Him knowledge/recognition (Marifah) of everything, Hence He knows languages, genealogies, deaths and events. If it wasn’t for that, there would be no difference between the proof (Hujjah) and those upon whom He is a proof (MaHjooj)".

[Source: al-Kafi, Vol.1, Pg. 509]

Hadith 5:

مُحَمَّدُ بْنُ الْحُسَيْنِ، عَنْ أَحْمَدَ بْنِ الْحَسَنِ الْمِيثَمِيِّ، عَنِ الْحُسَيْنِ بْنِ أَبِي الْعَرَنْدَسِ قَالَ: رَأَيْتُ أَبَا الْحَسَنِ عَلَيْهِ السَّلَامُ بِمِنًى وَ عَلَيْهِ نُقْبَةٌ وَ رِدَاءٌ، وَ هُوَ مُتَّكِئٌ عَلَى جَوَالِيقَ سُودٍ، مُتَّكِئٌ عَلَى يَمِينِهِ، فَأَتَاهُ غُلَامٌ أَسْوَدُ بِصَحْفَةٍ فِيهَا رُطَبٌ فَجَعَلَ يَتَنَاوَلُ بِيَسَارِهِ فَيَأْكُلُ وَ هُوَ مُتَّكِئٌ عَلَى يَمِينِهِ، فَحَدَّثْتُ بِهَذَا الْحَدِيثِ رَجُلًا مِنْ أَصْحَابِنَا قَالَ: فَقَالَ لِي: أَنْتَ رَأَيْتَهُ يَأْكُلُ بِيَسَارِهِ؟ قَالَ: قُلْتُ: نَعَمْ. قَالَ: أَمَا وَ اللَّهِ لَحَدَّثَنِي سُلَيْمَانُ بْنُ خَالِدٍ أَنَّهُ سَمِعَ أَبَا عَبْدِ اللَّهِ عَلَيْهِ السَّلَامُ يَقُولُ : صَاحِبُ هَذَا الْأَمْرِ كِلْتَا يَدَيْهِ يَمِينٌ

Narrated by al-Husain bin Abi al-Arndas who said,

"I saw Abu al-Hasan (عليه السلام) at Mina and upon him was a cloth and a robe, and He was leaning upon a black sackcloth, leaning upon His right side. A black slave came to Him with a bowl containing dates. The Imam (عليه السلام) went on to eat the dates with His left hand while He was leaning upon His right hand.

The narrator says, "I narrated this Hadith to a man from our companions. He said to me, ‘Did you seem Him eat with His left hand?’ I said, ‘Yes’.

He said, "By Allah! Sulayman Bin Khalid narrated to me that he heard Abu Abdullah (عليه السلام) saying, "The Master of this command (i.e  the Imams), both of His hands are right."

[Source: Qurb al-Asnaad, Pg. 308-309]

Hadith 6:

عدة من أصحابنا، عن سهل بن زياد، عن محمد بن حسن بن شمون قال: حدثني علي بن محمد النوفلي، عن أبي الحسن (عليه السلام) قال: ذكرت الصوت عنده فقال إن علي بن الحسين (عليهما السلام) كان يقرأ فربما مر به المار فصعق من حسن صوته و إن الامام لو أظهر من ذلك شيئا لما احتمله الناس من حسنه، قلت: ولم يكن رسول الله (صلى الله عليه وآله) يصلي بالناس ويرفع صوته بالقرآن؟ فقال: إن رسول الله (صلى الله عليه وآله) كان يحمل الناس من خلفه ما يطيقون

Narrated that Imam Abu al-Hasan Imam al-Hadi (عليه السلام) said,

"Ali ibn al-Husain (عليهما السلام) used to recite the Quran, and sometimes a passerby would hear him and be stunned by the beauty of His voice. And if the Imam were to reveal such reading, the people would not have been able to bear its beauty."

I (the narrator) said, "Did the Messenger of Allah (صلى الله عليه وآله) not pray with the people and raise his voice in reciting the Quran?"

The Imam (عليه السلام) said, "The Messenger of Allah (صلى الله عليه وآله) would put upon the people praying behind him only that which they could handle (i.e.  The Prophet would only recite according to what the people behind him would be able to handle)."

[Source: al-Kafi, Vol. 2, Pg. 615]