Umar (may Allah be pleased with him) and the prostration of the dihqan, and the prohibition of wearing brocade and silk and drinking from vessels of gold and silver

It is narrated from Abu Wa'il; he said: I took part in a military expedition with Sayyiduna Umar (may Allah be pleased with him) in Syria. We halted at a place, and a great landowner (dihqan) of that area came asking the way to the Amir al-Mu'minin. When he saw Sayyiduna Umar (may Allah be pleased with him), he began to prostrate (out of reverence). Sayyiduna Umar (may Allah be pleased with him) said: "What is this prostration?" He said: This is what we do with our kings. Sayyiduna Umar (may Allah be pleased with him) said: "Prostrate to your Lord who created you." He said: O Amir al-Mu'minin, I have prepared food for you, so come to my house. The narrator said: Sayyiduna Umar (may Allah be pleased with him) asked: "Are there pictures (made) by the non-Arabs in your house?" He said: Yes. He said: "I have no need to go to your house; rather, go and send us one kind of food, and do not add anything more to it." So he went and sent the food, and he ate from it. Then Sayyiduna Umar (may Allah be pleased with him) asked his servant: "Is there any of that nabidh in your water-skin?" He said: Yes. He brought it and poured it into a vessel. He smelled it and found its smell unpleasant, so he poured water into it; then he smelled it again and the smell was still unpleasant. He added water to it three times (in all), then he drank it and said: "When you have a doubt (because of its strength) about anything you drink, do the same with it." Then he said: I heard the Messenger of Allah (peace and blessings be upon him) saying: "Do not wear brocade and silk, and do not drink from vessels of gold and silver, for these are for them (the disbelievers) in this world and will be for us in the Hereafter."
This hadith has an authentic (sahih) chain, but the two Shaykhs (Bukhari and Muslim) did not record it.

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) supplicated: 'Allahumma ayyid al-dina bi-Umar ibn al-Khattab' (O Allah, support the religion through Umar bin al-Khattab).

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) supplicated: 'Allahumma a'izz al-Islama bi-Umar' (O Allah, grant Islam honour and dominance through Umar).
This hadith has an authentic (sahih) chain, but the two Shaykhs (Bukhari and Muslim) did not record it; and its supporting narration (shahid) reported from Sayyidah Aishah (may Allah be pleased with her) is also authentic.

It is narrated from Sayyidah Aishah (may Allah be pleased with her) that the Prophet (peace and blessings be upon him) supplicated: 'Allahumma a'izz al-Islama bi-Umar ibn al-Khattab khassatan' (O Allah, grant Islam honour and dominance through Umar bin al-Khattab in particular).
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it. The pivot of this hadith is the narration of al-Sha'bi from Masruq from Ibn Mas'ud: 'Allahumma a'izz al-Islama bi-ahabbi al-rajulayni ilayk' (O Allah, grant Islam dominance through whichever of the two men is more beloved to You); Mujalid bin Sa'id is alone in narrating it from al-Sha'bi, and I have not previously mentioned any narration of Mujalid.

It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) supplicated: 'Allahumma a'izz al-Islama bi-Umar ibn al-Khattab aw bi-Abi Jahl ibn Hisham' (O Allah, grant Islam dominance through Umar bin al-Khattab or Abu Jahl bin Hisham). So Allah Almighty accepted the supplication of His Messenger (peace and blessings be upon him) in favour of Umar; thus Allah laid the foundation of the dominion of Islam through him, and through him He brought down the idols.

It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him); he said: By Allah, we were not able to pray openly at the Ka'bah until Umar (may Allah be pleased with him) accepted Islam.
This hadith has an authentic (sahih) chain, but the two Shaykhs (Bukhari and Muslim) did not record it.

It is narrated from Sayyiduna Hudhayfah (may Allah be pleased with him); he said: In the time of Sayyiduna Umar (may Allah be pleased with him), Islam was like a man who is coming towards you, growing ever nearer and nearer; but when Sayyiduna Umar (may Allah be pleased with him) was martyred, Islam became like a man who has turned his back and is going away, growing ever farther and farther.
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.