Jami` at-Tirmidhi 2138
جامع الترمذي#2138SahihAbu Hurairah narrated that the Messenger of Allah (s.a.w) said:"Every child is born upon the Millah, then his parents make him a Jew, a Christian, or an idolater." It was said: "O Messenger of Allah! What about those who die before that?" He said: "Allah knows best what they would have done." [Another chain) with similar in meaning, and he said: "Born upon the Fiirah
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiSahih - Bukhari And Muslim
In-book reference: 32:6