It is narrated from Sayyiduna Umar (may Allah be pleased with him) that once I was with the Prophet (peace and blessings be upon him) in a battle. On one occasion, I swore an oath, saying: «لا وابي» Then a man from behind said to me, "Do not swear by the names of your forefathers." I looked and saw that it was the Prophet (peace and blessings be upon him).

It is narrated from Sayyiduna Umar (may Allah be pleased with him) that once the Prophet (peace and blessings of Allah be upon him) heard me swearing by my father. He said: "Allah Almighty has forbidden you from swearing by the names of your forefathers." After that, I never swore such an oath intentionally or even by way of quoting.

It is narrated from Sayyiduna Umar (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) permitted men to wear silk equal to two fingers in width.

Abu Uthman says that we were with Sayyiduna Utbah bin Farqad (may Allah be pleased with him) when a letter from Sayyiduna Umar (may Allah be pleased with him) arrived, in which it was written: The Messenger of Allah (peace and blessings be upon him) said: "Whoever wears silk clothing in this world, except for such a small amount"—and the Prophet (peace and blessings be upon him) indicated with his finger—"he will have no share of silk in the Hereafter."

Ya'la bin Umayyah says that I asked Sayyiduna Umar (may Allah be pleased with him) that the command of shortening the prayer in the Holy Qur'an has come in the state of "fear", but now there is peace and security everywhere, so has this command ended? (If so, then why is this verse still present in the Qur'an?) So Sayyiduna Umar (may Allah be pleased with him) said that I was also surprised in the same way as you are, and I also asked the Prophet (peace and blessings be upon him) about this, and he (peace and blessings be upon him) said: "This is a charity from Allah which He has bestowed upon His servants, so accept His charity and kindness."

The previous hadith is also mentioned through this second chain of narration.

Sayyiduna Umar (may Allah be pleased with him) says that the last verse revealed in the Noble Qur'an was regarding usury, so the Prophet (peace and blessings be upon him) did not get the opportunity to fully explain it before his blessed passing. Therefore, abandon usury as well, and leave whatever contains even a little doubt.

It is narrated from Sayyiduna Umar (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The deceased is punished in his grave because of the lamentation that is done over him."

It is narrated from Sayyiduna Umar (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The deceased is punished in his grave because of the weeping of his family over him."

Sayyiduna Sa'id bin al-Musayyib (may Allah have mercy on him) narrates that I heard Sayyiduna 'Umar (may Allah be pleased with him) saying: "Save yourselves from destruction regarding the verse of Rajm (stoning), lest someone says that we do not find mention of two punishments in the Book of Allah. I have seen the Prophet (peace and blessings be upon him) carrying out the punishment of Rajm, and we ourselves have also carried out this punishment."