Mukhtasar Bukhari

Narrated Abu Huraira (may Allah be pleased with him): The Messenger of Allah (peace and blessings of Allah be upon him) said: "Every child is born upon the natural disposition (fitrah) of Islam, but his parents make him a Jew, a Christian, or a Magian, just as an animal gives birth to a complete and sound offspring—do you see any among them born mutilated?" Abu Huraira (may Allah be pleased with him) would recite this verse after narrating the hadith: "The nature upon which Allah has created mankind. There is no altering Allah's creation. That is the correct and upright religion." (Surah Ar-Rum, Ayah: 30)