"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."
Jami` at-Tirmidhi Book 32, Hadith 6
← Previous Hadith The Messenger of Allah (s.a.w) narrated to us - and he is the truthful and entrusted one: 'Indeed the creation of one of you is gathered inside his mother in forty days. Then, for a similar period, he is a clot. Then, for a similar period, he is a piece of flesh. Then Allah sends the angel to him to blow the soul into him, and he is ordered to write four (things): To write his provision, his life-span, his works, and whether he will be wretched or happy. By the One besides Whom there is none other worthy of worship! One of you will do deeds of the people of Paradise, until there is between him and it but a forearm span, then he is overcome by what is written for him, and he is sealed off with the deeds of the people of the Fire, so that he enters it. And indeed one of you will do deeds of the people of the Fire, until there is between him and it but a forearm span, then he is overcome by what is written for him, and he is sealed off with the deeds of the people of Paradise, so that he enters it.'"

Another chain reports a similar narration.

Jami` at-Tirmidhi Book 32, Hadith 5 Next Hadith → "Nothing turns back the Decree except supplication, and nothing increases the life-span except righteousness."

Jami` at-Tirmidhi Book 32, Hadith 7