It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) once asked the companions (may Allah be pleased with them): "Do you know which charity is the most virtuous?" The companions (may Allah be pleased with them) replied: Allah and His Messenger know best. The Prophet (peace and blessings be upon him) said: "It is the gift that one of you presents to his brother, whether it is money, the back of an animal (for riding), goat's milk, or cow's milk."

Sayyiduna Ibn Mas'ud (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "It is extremely bad for any man among you to say, 'I forgot such and such verse,' rather he should say, 'Such and such verse was made to be forgotten by me.' Safeguard this Qur'an, for it escapes from people's hearts more swiftly than a camel escapes from its rope."

Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) narrates that in the beginning, during prayer, we used to talk and greet each other, and would inform one another as needed. One day I came to the Prophet (peace and blessings be upon him) and greeted him with salam, but the Messenger of Allah (peace and blessings be upon him) did not reply. Various thoughts, both new and old, surrounded me. When the Prophet (peace and blessings be upon him) finished the prayer, he said, "Allah gives whatever new command He wishes. Thus, Allah has now revealed this new command that you should not talk during prayer."

It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that once the Prophet (peace and blessings of Allah be upon him) led five rak'ahs in the Zuhr prayer. The people asked, "Has there been an addition in the prayer?" So the Prophet (peace and blessings of Allah be upon him) performed two prostrations of forgetfulness (sujood as-sahw).

It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "No one is permitted to talk after the 'Isha prayer except for two persons: one who is praying or one who is traveling."

Huzail bin Shurahbil says that once a man came to Sayyiduna Abu Musa (may Allah be pleased with him) and asked him this issue: If a person’s heirs include a daughter, a granddaughter, and a real sister, how will the inheritance be distributed? He replied: Half of the total wealth will go to the daughter and the other half to the sister, and you should go to Sayyiduna Ibn Mas’ud (may Allah be pleased with him) and ask him this issue as well; he will agree with and support us. So that man went to Sayyiduna Ibn Mas’ud (may Allah be pleased with him) and asked him the issue, also mentioning the answer of Sayyiduna Abu Musa (may Allah be pleased with him). Sayyiduna Ibn Mas’ud (may Allah be pleased with him) said: If I also give this same verdict, then I will go astray and will not remain among the rightly guided. I will give the same decision that the Prophet (peace and blessings be upon him) gave:“The daughter will get half of the total wealth, the granddaughter will get one-sixth so that two-thirds are completed, and whatever remains will go to the sister.”People went to Sayyiduna Abu Musa (may Allah be pleased with him) and informed him of Sayyiduna Ibn Mas’ud’s (may Allah be pleased with him) opinion, so he said: As long as such a great scholar is present among you, do not ask me questions.

It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that the Prophet (peace and blessings of Allah be upon him) was returning from Hudaybiyyah at night, and we camped on soft ground. The Prophet (peace and blessings of Allah be upon him) said: "Who will keep watch over us? (Who will wake us up for Fajr?)" Sayyiduna Bilal (may Allah be pleased with him) offered himself. The Prophet (peace and blessings of Allah be upon him) said: "What if you also fall asleep?" He replied: "I will not sleep." By coincidence, he too fell asleep until the sun had risen and so-and-so companions woke up, among them was Sayyiduna Umar (may Allah be pleased with him). He woke everyone up, and the Prophet (peace and blessings of Allah be upon him) also woke up and said: "Do as you used to do (perform the prayer as usual)." When the people had done so, he said: "If any of you sleeps or forgets, then do the same."

Meanwhile, the Prophet's (peace and blessings of Allah be upon him) she-camel was lost. The Prophet (peace and blessings of Allah be upon him) had it searched for, and it was found by me in such a state that its rope was entangled in a tree. I brought it to the Prophet (peace and blessings of Allah be upon him), and he happily mounted it. When revelation would descend upon the Prophet (peace and blessings of Allah be upon him), its effect would be very intense upon him, and we would recognize that state by seeing it. On this occasion, the Prophet (peace and blessings of Allah be upon him) turned to one side and covered his blessed head with a cloth, and the state of intensity came upon him, by which we recognized that revelation was descending upon him. After a short while, the Prophet (peace and blessings of Allah be upon him) came to us and informed us that Surah Al-Fath had been revealed to him.

Sayyiduna Ibn Mas'ud (may Allah be pleased with him) narrates that when we used to sit in Tashahhud with the Prophet (peace and blessings be upon him), we would say: "Peace be upon Allah from His servants." When the Prophet (peace and blessings be upon him) heard us saying this, he said: "Allah Himself is the embodiment of peace, so instead of saying this, say: «التَّحِيَّاتُ لِلّٰهِ وَالصَّلَوَاتُ وَالطَّيِّبَاتُ السَّلَامُ عَلَيْكَ أَيُّهَا النَّبِيُّ وَرَحْمَةُ اللّٰهِ وَبَرَكَاتُهُ السَّلَامُ عَلَيْنَا وَعَلَى عِبَادِ اللّٰهِ الصَّالِحِينَ أَشْهَدُ أَنْ لَا إِلٰهَ إِلَّا اللّٰهُ وَأَشْهَدُ أَنَّ مُحَمَّدًا عَبْدُهُ وَرَسُولُهُ» 'All verbal, physical, and bodily acts of worship are for Allah alone. O Prophet (peace and blessings be upon him), may Allah's peace, mercy, and blessings descend upon you. May peace descend upon us and upon the righteous servants of Allah. I bear witness that there is no deity except Allah and that Muhammad (peace and blessings be upon him) is Allah's servant and His Messenger.'"

It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that once I asked the Prophet (peace and blessings be upon him): "Which sin is the greatest?" The Prophet (peace and blessings be upon him) said: "To associate partners with Allah, especially when He alone has created you; to kill your child out of fear that he will eat with you; and to commit adultery with your neighbor's wife."

It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "When you are three people, then two of you should not whisper to each other excluding the third, for that will cause him grief. And no woman should touch her naked body to another woman so that she describes her physical features to her husband in such a way as if he is seeing her with his own eyes."