It is narrated from Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever conceals knowledge, Allah will bridle him on the Day of Resurrection with a bridle of fire." This is an authentic chain from the narration of the Egyptians, on the condition of the two Shaykhs (Bukhari and Muslim), and there is no hidden defect ('illah) in it. In this chapter there is also a group of Companions besides Abu Hurayrah.

It is narrated from Amir al-Sha'bi that Qarazah bin Ka'b said: We set out intending to go to Iraq, and Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) walked with us as far as Sirar. He performed ablution and then said: "Do you know why I walked with you?" They said: "Yes, we are the Companions of the Messenger of Allah (peace and blessings be upon him), so you walked with us." He said: "You are going to the people of a town where the sound of the Qur'an resounds like the humming of bees. So do not begin with hadiths as soon as you reach them, lest you distract them. Keep the Qur'an pure, and narrate little (hadith) from the Messenger of Allah (peace and blessings be upon him). Go, and I am your partner (in this decision)." When Qarazah arrived there, the people said: "Narrate hadith to us." He said: "Ibn al-Khattab (Umar, may Allah be pleased with him) has forbidden us." This is a hadith with an authentic chain that has several routes which are gathered together. Qarazah bin Ka'b al-Ansari is a Companion who heard from the Messenger of Allah (peace and blessings be upon him), and our condition regarding the Companions is that we do not pass over them, while the two Shaykhs used the rest of its narrators as evidence.

It is narrated from Amir bin Sa'd al-Bajali: I went in to Qarazah bin Ka'b, Abu Mas'ud and Zayd bin Thabit, and saw that girls were singing in their presence. I said to them: "You do this while you are Companions of the Messenger of Allah (peace and blessings be upon him)?!" They said: "If you wish to listen, sit; otherwise go, for the Messenger of Allah (peace and blessings be upon him) granted us a concession for amusement (expressing joy) at a wedding, and for weeping over the deceased."

It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever attributes to me what I did not say, let him take his seat in the Fire. Whoever is asked for advice by his brother and advises him wrongly has betrayed him. And whoever is given a fatwa without verification (by an unreliable means), its sin is upon the one who gave him the fatwa."

It is narrated from Muslim bin Yasar: I heard Sayyiduna Abu Hurayrah (may Allah be pleased with him) say that the Messenger of Allah (peace and blessings be upon him) said: "Whoever attributes to me what I did not say, let him prepare his dwelling in Hell. Whoever is given a fatwa without knowledge, its sin is upon the one who gave him the fatwa. And whoever advises his brother on a matter while knowing that the right course lies in something else has betrayed him." The two Shaykhs used all of its narrators as evidence except Amr (bin Abi Nu'aymah), and Bakr bin Amr al-Ma'afiri, one of the imams of Egypt, declared him trustworthy. We are in great need of the wording about verification and care in giving fatwas.

It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "In the last age there will be people from my Ummah who will narrate to you things that neither you nor your forefathers have heard, so keep yourselves away from them." Imam Muslim mentioned this hadith in the introduction of his book along with the reports, but did not record it in the chapters of the book, although it is sahih (authentic) on the condition of both of them, and it is needed in the matter of criticism and accreditation of narrators (al-jarh wa al-ta'dil), and I know of no hidden defect ('illah) in it.

It is narrated from Abd al-Rahman bin Yazid that Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: "Moderation in following the Sunnah is better than striving hard in innovation."

It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) (like the previous saying). This is an authentic musnad hadith on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it. Of this kind, they recorded the narration of Abu Ishaq containing the words: "There are only two things: guidance and speech. The best speech is the speech of Allah, and the best guidance is the guidance of Muhammad (peace and blessings be upon him)."

It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) used to supplicate: 'Allahumma inni a'udhu bika min al-arba': min 'ilmin la yanfa', wa qalbin la yakhsha', wa nafsin la tashba', wa du'a'in la yusma'' (O Allah, I seek refuge in You from four things: from knowledge that does not benefit, from a heart that does not humble itself (before You), from a soul that is not satisfied, and from a supplication that is not accepted). This hadith is sahih (authentic), but they did not record it, because neither of them narrated from Abbad bin Abi Sa'id al-Maqburi, not because of any criticism of him, but because of the small number of his narrations and the little need for him.

It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) used to supplicate: 'Allahumma inni a'udhu bika min al-arba': min 'ilmin la yanfa', wa qalbin la yakhsha', wa nafsin la tashba', wa du'a'in la yusma'' (O Allah, I seek refuge in You from four things: from knowledge that does not benefit, from a heart that is not humble, from a soul that is never satisfied, and from a supplication that is not heard). It has an authentic supporting narration (shahid) from the narration of Sayyiduna Anas bin Malik (may Allah be pleased with him) on the condition of Imam Muslim.