It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Every child is born upon the fitrah (natural disposition); then his parents make him a Jew or make him a Christian, just as a camel gives birth to a sound young one. Have you ever seen one with its ear cut off?" They said: "O Messenger of Allah (peace and blessings be upon him)! What do you say about one who dies while still young?" He (peace and blessings be upon him) said: "Allah Almighty knows best what they would have done."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب اللقطة / 12137