It is narrated from Sayyiduna Abu Shaddad (may Allah be pleased with him), a resident of Dama, one of the villages of Oman, that he said: The letter of the Messenger of Allah (peace and blessings be upon him) to the people of Oman came to us, in which was written: "Peace. To proceed: Affirm the testimony that there is no god worthy of worship except Allah and that I am the Messenger of Allah, pay the zakah, and mark out (and build) mosques; otherwise I will wage war against you."
Sayyiduna Abu Shaddad (may Allah be pleased with him) said: "We could not find anyone who would read the letter to us, until we found a black boy who read it to us." (The narrator says:) I asked Sayyiduna Abu Shaddad (may Allah be pleased with him): Who was the ruler of Oman in those days? He said: "He was one of the horsemen of Chosroes, called Sahan."
Imam al-Tabarani (may Allah have mercy on him) said: "This hadith is not narrated from Sayyiduna Abu Shaddad (may Allah be pleased with him) except with this chain, and Musa bin Isma'il (may Allah have mercy on him) is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الميم / 6849
Hadith Gradingمحدثین:إسناده ضعيف، مرسل وفيه من لا يُعرف
Hadith Takhrij«قال الهيثمي: إسناده لم أر أحدا ذكرهم إلا أن الطبراني قال تفرد به موسى بن إسماعيل قلت وليس بالتبوذكي لأن هذا يروي عن التابعين «مجمع الزوائد ومنبع الفوائد، ج 1، ص 29»» «قال الهيثمي: وهو مرسل وفيه من لا يعرف «مجمع الزوائد ومنبع الفوائد، ج 3، ص 64»»