It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: Every child is born upon pure nature; later, his parents make him a Jew, Christian, or Magian. Its example is like an animal giving birth to an animal—do you find any defect in it?
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 9102