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Abraham is called father of their nations.
I would say Abraham. Wasn't he the Great Great Great............. Grand Farther of all of them?
Abraham was the christians father in faith and a person honored by the Muslims
Abraham.
The Jews. Muslims also claim lineage from Abraham.
No, King David is not the ansestor to many Jewish people. The closest ansestor that the Jews and Muslims share is Abraham.
Abraham's son Ishmael.
Out of the loins of Abraham came the jews, while the Muslims regard him as the one and only prophet who was worth of mention in the Kuran. The Islamic people refer to his a Father Abraham.
They both come from Abraham's children, Jews are children of Issac and Arabs are children of Ismael.
Muslims trace their ancestry through Abraham's son Ismael. Jews trace their ancestry through Abraham's son Isaac.
No one worships Abraham, however, he is significant to Jews, Christians and Muslims. All three faiths can link themselves back to Abraham.