Imam Ibrahim al-Nakha'i, may Allah have mercy on him, said: I found the predecessors such that if any one of them did not exceed even the measure of a fingernail, then I too would not go beyond that (i.e., would not exceed). It is sufficient disgrace for a people that you oppose their actions.

Ata bin Abi Rabah, may Allah have mercy on him, said in the explanation of the verse «﴿أَطِيعُوا اللَّهَ وَأَطِيعُوا الرَّسُولَ وَأُولِي الْأَمْرِ مِنْكُمْ ....﴾» [النسا: 59/4] that «اولي الامر» are the people of knowledge and understanding, and «طاعة الرسول» is following the Book and the Sunnah.

Ibrahim bin Adham narrated that I asked Abdullah bin Shubrumah about something whose ruling was very important to me. I said: May Allah have mercy on you, please consider this matter. He said: If I understand it and find it in the hadith, I will certainly not hesitate.

Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) said to me: "Learn knowledge and teach it to the people, learn the knowledge of obligations (fara'id) and teach it to the people, learn the Qur'an and teach it to the people. Surely, I am about to pass away and knowledge will diminish, tribulations will appear until two men will differ regarding an obligation (fard) and there will not be anyone who can decide between them."

Narrated by Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) sent Sayyiduna Mu'adh bin Jabal and Sayyiduna Abu Musa Ash'ari (may Allah be pleased with them both) towards Yemen and said: Both of you should trust each other, obey one another, make things easy and do not spread hatred. So when these two noble companions reached Yemen, Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) delivered a sermon, encouraged the people towards Islam, and instructed them to understand the Qur'an. He said: When you have done this, then ask me, and I will tell you about the people of Paradise and the people of Hell. Thus, as long as Allah willed, those people remained silent. Then they said to Sayyiduna Mu'adh (may Allah be pleased with him): You had instructed us that if we understood the Qur'an, we should ask you, so you would tell us about the people of Paradise and the people of Hell. So Sayyiduna Mu'adh (may Allah be pleased with him) said: When a person is remembered with goodness, he is among the people of Paradise, and when he is remembered with evil, he is among the people of Hell.

Sayyiduna Abu Huraira (may Allah be pleased with him) narrated that it was asked: O Messenger of Allah! Who is the most noble? He replied: "The one who is the most pious." It was said: We are not asking about this. He said: "Then Allah's Prophet Yusuf, son of Allah's Prophet, son of Allah's Prophet, son of Allah's Khalil (is the most noble)." The companions said: We are not asking about this either. The Messenger of Allah (peace and blessings be upon him) said: "Alright, are you asking about the families of the Arabs? Listen, those who were noble in the time of ignorance are also noble in Islam, provided they gain understanding of the religion."

Sayyiduna Muawiyah (may Allah be pleased with him) said: I heard the Messenger of Allah (peace and blessings be upon him) say: When Allah intends good for someone, He grants him understanding of the religion.

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "When Allah intends good for someone, He grants him understanding of the religion."

Sayyiduna Muawiyah (may Allah be pleased with him) said: I heard the Messenger of Allah (peace and blessings of Allah be upon him) say: "When Allah intends good for someone, He gives him understanding of the religion."

Muhammad bin Jubair bin Mut’im narrated from his father, who heard in the Farewell Pilgrimage on the day of Arafah, the sermon of the Messenger of Allah (peace be upon him):“O people! Indeed, I do not know whether after today I will be able to meet you again at this place. So may Allah have mercy on the person who heard my words today and remembered them. Some who learn jurisprudence (fiqh) are not themselves jurists, and many who carry jurisprudence convey it to someone more knowledgeable than themselves. And O people! Know that your wealth and your blood are sacred to each other just as the sanctity of this day, this month, and this city. And listen! Hearts will not betray in three things: making deeds sincere for Allah, being sincere with the rulers, and adhering to the community of Muslims. Indeed, their supplication encompasses them.”(That is, the supplication surrounds them for protection from calamities and afflictions.)