When the great battles occur, an army of the mawali will set out, the most honourable of the Arabs

It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that he said: I heard the Messenger of Allah (peace and blessings be upon him) say: "When the great battles (malahim) take place, an army of non-Arab Muslims (mawali) will come out from Damascus. They will be the most honourable of the Arabs in horsemanship and the finest in weaponry, and Allah Almighty will support and aid the religion of Islam through them."
This hadith is sahih (authentic) on the condition of Imam Bukhari, but the two Shaykhs (Bukhari and Muslim) did not record it.

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: "A fire will be sent upon the people of the east which will drive them towards the west. That fire will spend the night wherever they spend the night, and will take its midday rest (qaylulah) wherever they rest. Whoever of them falls or lags behind, the fire will engulf him. It will drive them as an injured or exhausted camel is driven."
This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.

It is narrated from Talhah al-Nasri (may Allah be pleased with him) that when a man among us came to Madinah and had an acquaintance (an 'arif) there, he would stay with him, and if he had no acquaintance there, he would stay in the Suffah. So I came to Madinah and had no acquaintance there, so I stayed in the Suffah. Every day we would receive from the Messenger of Allah (peace and blessings be upon him) one mudd of dates between every two men, and he (peace and blessings be upon him) would clothe us in fine cotton cloth (khunuf). One day the Messenger of Allah (peace and blessings be upon him) led us in one of the daytime prayers, and when he (peace and blessings be upon him) said the salam, the people of the Suffah called out to him (peace and blessings be upon him) from the right and the left: "O Messenger of Allah! The dates have burned our stomachs, and our garments have been torn to shreds." Then the Messenger of Allah (peace and blessings be upon him) went to his pulpit, ascended it, praised and extolled Allah, and then mentioned the hardships he (peace and blessings be upon him) had endured from his people, until he (peace and blessings be upon him) said: "More than ten days passed over me and my companion in which we had nothing to eat except the fruit of the arak tree (al-barir)." The narrator said: I asked Abu Harb: What is barir? He said: It is poor food, namely the fruit of the arak tree. Then he (peace and blessings be upon him) said: "Then we came to these brothers of ours from the Ansar, whose main food was dates, and they shared it with us. By Allah! If I could find bread and meat for you, I would certainly feed you your fill of it. But perhaps you will live to see a time, or whoever of you lives to see it, when great bowls of food will be brought to you morning and evening, and you will wear garments like the coverings of the Ka'bah." Dawud said: Abu Harb asked me: O Dawud! Do you know what the coverings of the Ka'bah were like in those days? I said: No. He said: They were white cloths that used to be brought from Yemen. Dawud said: I narrated this hadith to al-Hasan al-Basri, and he said that the Messenger of Allah (peace and blessings be upon him) also said: "You today are better than you will be on that future day. Today you are brothers by the blessing of Allah, whereas on that day you will be enemies of one another and will strike one another's necks."
This hadith has a sahih (authentic) chain, but the two Shaykhs (Bukhari and Muslim) did not record it.