The Prophet ﷺ said, "No child is born except upon this faith, and then his parents make him a Jew or a Christian." On one occasion Waki said, "upon the faith."
حدثنا محمد بن علي بن الحسن بن شقيق قال سمعت أبي عن أبي حمزة عن الأعمش عن أبي صالح عن أبي هريرة عن النبي ﷺ قال لا يولد مولود إلا على هذه الملة فأبواه يهودانه وينصرانه فذكر نحوه
Its isnad is sahih. Muhammad bin Ali bin Hasan bin Shaqiq Abdi Marwazi is trustworthy, and he has a biography in Tahdhib. Ibn Abu Hatim also gave him a biography in Jarh wal-Tadil 28/1/4, mentioning that his father, Abu Hatim, narrated from him. Khatib gave him a biography in Tarikh Baghdad 3:55-56. He was one of the teachers of Bukhari and Muslim, both of whom narrated from him outside the Sahihayn. He came after Imam Ahmad, dying in the year 250 or 251, that is, about ten years after Ahmad.It is established here in the three original manuscripts that Abdullah bin Ahmad said, "My father narrated to me," though Ibn Jawzi did not mention this Muhammad among the teachers of Ahmad in his book Manaqib. So if the affirmation of his statement "My father narrated to me" in the copies of the Musnad here is not a slip of the copyists, then this isnad would be an instance of elders narrating from those younger than themselves, and this shaykh would be among the few teachers of Ahmad from whom he narrated while they were still alive.As for his father, Ali bin Hasan bin Shaqiq, he was one of the teachers of Ahmad and Bukhari, and he was trustworthy, and he was among the people most retentive of the books of Ibn Mubarak. He has a biography in Tahdhib, and Ibn Saad gave him a biography in Tabaqat 107/2/7, and Bukhari in Saghir 233, and Ibn Abu Hatim in Jarh wal-Tadil 180/1/3. There is disagreement about the year of his death, and the correct view, affirmed decisively by Bukhari, is that it was the year 215.Abu Hamza is Sukkari, Muhammad bin Maymun Marwazi, whose reliability was already established at 2621, and we add here that Ibn Abu Hatim gave him a biography at 81/1/4, and Khatib at 3:266-269.The hadith is a repetition of the one before it, with similar wording.