It is narrated from Sayyiduna Abu Musa al-Ash'ari (may Allah be pleased with him) that he said: "We set out by sea towards the Messenger of Allah (peace and blessings be upon him) until we reached Makkah. With me at that time were my brothers, Sayyiduna Abu Amir bin Qays, Sayyiduna Abu Ruhm bin Qays and Sayyiduna Muhammad bin Qays (may Allah be pleased with them), and (in our party) there were fifty people of the Ash'ari tribe and six of the tribe of Akk. Then we emigrated by sea until we reached Madinah."
Hadith Referenceمسند أبي يعلى الموصلي / حديث أبي موسى الأشعري / 7232
Hadith Takhrij«قال سعيد بن محمد السناري: صحيح» «أخرجه ابن حبان [7194]، وابن أبي خيثمة في "تاريخه" [رقم 2750]، والبزار، مسند ابویعلیٰ ترقیم الاثری: 7197»