It is narrated from Sayyiduna Abu Qirsafah (may Allah be pleased with him) that he said: The Messenger of Allah (peace and blessings be upon him) said to me: "Do you have any offspring?" I said: I have a brother. He said: "Bring him." So I was gentle with my brother, and he was a small boy, until he came with me. When he drew near to the Prophet (peace and blessings be upon him), he ran away, so I caught him and held his hands and feet together, then I brought him to the Prophet (peace and blessings be upon him), and the Prophet (peace and blessings be upon him) took his pledge of allegiance. His name was Maysam, so the Prophet (peace and blessings be upon him) said to me: "O Abu Qirsafah, what is his name?" I said: His name is Maysam. He said: "Rather, his name is Muslim." I said: Muslim is with you, O Messenger of Allah.
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 2501