Imam Muslim from Nihapour/Iran named a entire chapter of his Sahih “THE MERITS OF THE PEOPLE OF PERSIA” (Chapter 59):
Abu Huraira reported Allah’s Messenger (may peace be upon him) as saying: If the din were at the Pleiades, even then a person from Persia would have taken hold of it, or one amongst the Persian descent would have surely found it.
Abu Huraira reported: We were sitting in the company of Allah’s Apostle (may peace be upon him) that Sura al-Jumu’a was revealed to him and when he recited (these words):” Others from amongst them who have not yet joined them,” a person amongst them (those who were sitting there) said: Allah’s Messenger! But Allah’s Apostle (may peace be upon him) made no reply, until he questioned him once, twice or thrice. And there was amongst us Salman the Persian. The Apostle of Allah (may peace be upon him) placed his hand on Salman and then said: Even if faith were near the Pleiades, a man from amongst these would surely find it.
This was the attitude of the Messenger of ALLAH [saws] towards the Persian people and n what the prophet [saws] said in the farewell pilgrimage, after he escalated the platform, he praised Allah then said — as was narrated in “al-Targheeb” book for “al-Monthery”- :
(O people, your God is only one and your father[Adam] is one, NO preference to an Arabian for a non-Arabian, or to a red-colored for a black-colored , preference is only by Taqwa (PIETY).The final Messenger of Allah HATED Nationalism !Ubayy bin Ka’b narrated that the Messenger of Allah said:
“If you see a man taking pride in his ascription to a people in the manner of jahiliyyah, tell him to go bite his father’s penis, and do not sugarcoat my words.”[‘Sahih al-Jami” (567), and ‘as-Silsilah as-Sahihah’ (269)]
It was narrated that Salman Al-Farsi [ra] the companion of the Prophet [saws] was saying:
“My Father Is Islam, I Got No Other Father!”
he also used to say: ‘I am Salman, the SON OF ISLAM from the children of Adam.’