The remainder of Abraham's history is subject to great difficulties. God, who frequently appeared to and made several treaties with him, one day sent three angels to him in the valley of Mamre. The patriarch gave them bread, veal, butter, and milk to eat. The three spirits dined, and after dinner they sent for Sarah, who had baked the bread. One of the angels, whom the text calls _the Lord, the Eternal_, promised Sarah that, in the course of a year, she should have a son. Sarah, who was then ninety-four, while her husband was nearly a hundred, laughed at the promise--a proof that Sarah confessed her decrepitude--a proof that, according to the Scripture itself, human nature was not then very different from what it is now. Nevertheless, the following year, as we have already seen, this aged woman, after becoming pregnant, captivated King Abimelech. Certes, to consider these stories as natural, we must either have a species of understanding quite different from that which we have at present, or regard every trait in the life of Abraham as a miracle, or believe that it is only an allegory; but whichever way we turn, we cannot escape embarrassment. For instance, what are we to make of God's promise to Abraham that he would give to him and his posterity all the land of Canaan, which no Chaldæan ever possessed? This is one of the difficulties which it is impossible to solve. It seems astonishing that God, after causing Isaac to be born of a centenary father and a woman of ninety-five, should afterwards have ordered that father to murder the son whom he had given him contrary to every expectation. This strange order from God seems to show that, at the time when this history was written, the sacrifice of human victims was customary amongst the Jews, as it afterwards became in other nations, as witness the vow of Jephthah. But it may be said that the obedience of Abraham, who was ready to sacrifice his son to the God who had given him, is an _allegory_ of the resignation which man owes to the orders of the Supreme Being. There is one remark which it is particularly important to make on the history of this patriarch regarded as the father of the Jews and the Arabs. His principal children were Isaac, born of his wife by a miraculous favor of Providence, and Ishmael, born of his servant. It was in Isaac that the race of the patriarch was blessed; yet Isaac was father only of an unfortunate and contemptible people, who were for a long period slaves, and have for a still longer period been dispersed. Ishmael, on the contrary, was the father of the Arabs, who, in course of time, established the empire of the caliphs, one of the most powerful and most extensive in the world. The Mussulmans have a great reverence for Abraham, whom they call _Ibrahim_. Those who believe him to have been buried at Hebron, make a pilgrimage thither, while those who think that his tomb is at Mecca, go and pay their homage to him there.