93:9.8
The Hebrew narratives of Isaac, Jacob, and Joseph are far more reliable than those about Abraham, although they also contain many diversions from the facts, alterations made intentionally and unintentionally at the time of the compilation of these records by the Hebrew priests during the Babylonian captivity. Keturah was not a wife of Abraham; like Hagar, she was merely a concubine. All of Abraham’s property went to Isaac, the son of Sarah, the status wife. Abraham was not so old as the records indicate, and his wife was much younger. These ages were deliberately altered in order to provide for the subsequent alleged miraculous birth of Isaac.