Is there a hadith stating that the Prophet (peace be upon him) established a brotherhood between: "Abu Bakr al-Qurashi and Bilal al-Habashi," "Umar ibn al-Khattab and Suhayb al-Rumi," and "Ali ibn Abi Talib and Salman al-Farisi"? And who narrated it, what is its grading, and when was it said?

The person who attributed the aforementioned statement to the Prophet, peace and blessings be upon him, has not been identified; rather, it is a statement mentioned by some contemporaries. It appears that its intent is the general brotherhood among Muslims, which is a sound principle, based on the Almighty's saying: "Indeed, the believers are brothers," and the Prophet's saying, peace and blessings be upon him: "The Muslim is the brother of the Muslim." As for the specific brotherhood that the Prophet, peace and blessings be upon him, established after the Hijrah, it was between the Muhajirun and the Ansar and not between those mentioned in the question.