It says in one narration that the Persians will perish before Arabs and that few of them will remain in Sham
إن أول الناس فناء أو هلاكا ،فارس ، ثم العرب الا بقايا ها هنا
The hadith is reported by نعيم بن حماد and narrated by ابوهريرة and it is very weak .
But there are other Hadith that mentions the perishing of the Arabs and that most of the remaining few will be in Sham
- the First Correct Hadith N 2494 in the Musnad (the destruction of the Arabs after attacking the Mahdi)
يبايَعُ لِرَجلٍ بينَ الرُّكنِ والمقامِ، ولن يَستَحلَّ البيتَ إلَّا أَهْلُهُ ، فإذا استحلُّوهُ ، فلا تسأَلْ عن هلَكَةِ العرَبِ ثمَّ تأتي الحبَشةُ فيُخرِّبونَهُ خرابًا لا يُعمَرُ بعدَهُ أبدًا، وَهُمُ الَّذينَ يستخرِجونَ كنزَهُ
الراوي : أبو هريرة | المحدث : الوادعي | المصدر : الصحيح المسند
- the Second Correct Hadith N 2945 in Sahih Muslim (the remaining Arabs in Quds)
ليفرن الناس من الدجال في الجبال، قالت أم شريك: يا رسول الله ! فأين العرب يومئذ ؟ قال: هم قليل و جلهم ببيت المقدس
- the Third Correct Hadith in Sahih muslim (the total destruction of the Arabs will never come from a foreign enemy)
سَأَلْتُ رَبِّي ثَلَاثاً, فَأَعْطَانِي ثِنْتَيْنِ وَمَنَعَنِي وَاحِدَةً, سَأَلْتُ رَبِّي أَنْ لَا يُهْلِكَ أُمَّتِي بِالسَّنَةِ فَأَعْطَانِيهَا, وَسَأَلْتُهُ أَنْ لَا يُهْلِكَ أُمَّتِي بِالْغَرَقِ فَأَعْطَانِيهَا, وَسَأَلْتُهُ أَنْ لَا يَجْعَلَ بَأْسَهُمْ بَيْنَهُمْ فَمَنَعَنِيهَا
there are other Hadiths that describe the end of the Arabs and even more Hadiths about Sham being the final castle of Islam and remaining a war zone until the Mahdi take over and after and Quds being the Capital of the last Khilafa ...
There are many hadith on Iranians.
One mentions that the Persians will hold onto the faith of Islam.
There is aslo one hadith that mentions Iranians will fight Arabs in the way of Islam
There is also one hadith that says muslims must join the army of black banners from Khorasan
I found them:
While we were sitting with the Prophet Surat Al-Jumu'a was revealed to him, and when the Verse, "And He (Allah) has sent him (Muhammad) also to other (Muslims).....' (62.3) was recited by the Prophet, I said, "Who are they, O Allah's Apostle?" The Prophet did not reply till I repeated my question thrice. At that time, Salman Al-Farisi was with us. So Allah's Apostle put his hand on Salman, saying, "If Faith were at (the place of) Ath-Thuraiya (pleiades, the highest star), even then (some men or man from these people (i.e. Salman's folk) would attain it."
Sahih Bukhari Volume 6, Book 60, Number 420:
Narrated Abu Huraira
There will emerge from Khorasan black banners which nothing will repel until they are set up in
Jerusalem
— Ahmad in al-Musnad, 14/383
When the black flags come from Khorasan go to them,even if you have to crawl on snow, for among them is the
Khalifa of Allah, the Mahdi
— Abd al-‘Alim in al-Mahdi al-Muntazar
Surely black flags will appear from the Khorasan until the people (under the leadership of this flag) will tie their horses with the olive trees between
Bait-e-Lahya and
Harasta (names of places in Jerusalem)
— Nuaim Ibn Hammad in Kitab Al-Fitan
A Nation will come from the east with black flags and they will ask for some goodness (authority) but the people will not give them, then, they will fight and win over those people. Now the people will give them what they asked for but they will not accept it until they will hand it over to a person from my progeny who will fill this earth with justice just as it was previously filled with oppression and tyranny. So if anyone of you finds this nation (i.e. from the east with black flags) then you must join them even if you have to crawl over ice
— Al-Barzanji in Isha’ah li Ashrat Al-Sa’a
Three will fight one another for your treasure, each one of them the son of a
caliph, but none of them will gain it. Then the black banners will come from the east, and they will kill you in an unprecedented manner. When you see them, then pledge your allegiance to them even if you have to crawl over the snow, for that is the caliph of Allah, Mahdi
— Sunan Ibn Majah, 4084
One Friday 'Ali (A) was delivering his sermon on a pulpit made of bricks Al-'Ash'ath ibn Qays al-Kindi, one of the eminent Arab chieftains, came up and said: "These red-faced people (Iranians) have come to dominate us in your presence and you don't stop them." Then he angrily declared, "Today I will show what Arabs are!"
'Ali (A) said: "These big-bellied ones drowse in soft beds while they (the Mawali and Iranians) work hard during hot days for the sake of God. Even then they demand that I should drive them away like a tyrant. By God, Who split the seed and created man, I have heard from the Prophet (S) of God, saying : 'By God, even as you in the beginning will fight Iranians with your swords for the sake of Islam Iranians will afterwards fight you with their swords in the way of Islam.
Shaykh 'Abbas al-Qummi, Safinat al-Bihar, (under wall), c.f. al-Kay.