Yet he obeyed and believed, and was led into the beautiful hilly land then held by the sons of Canaan, where he was a stranger, wandering with his flocks and herds and servants from one green pasture to another, without a loot of land to call his own. For showing his faith by thus doing as he was commanded, Abram was rewarded by the promise that in his Seed should all the families of the earth be blessed; his name was changed to Abraham, which means a father of a great multitude; and as a sign that he had entered into a covenant with God, he was commanded to circumcise his children. One son, Ishmael, had by this time been born to him of the bondmaid Hagar; but the child of promise, Isaac, the son of his wife Sarah, was not given till he was a hundred years old. Ishmael was cast out for mocking at his half-brother, the heir of the promises; but in answer to his father's prayers, he too became the father of a great nation, namely the Arabs, who still live in the desert, with their tents, their flocks, herds, and fine horses, much as Ishmael himself must have lived. They are still circumcised, and honour Abraham as their father; and with them are joined the Midianites and other tribes descended from Abraham's last wife, Keturah. Isaac alone was to inherit the promise, and it was renewed to him and to his father, when their faith had been proved by their submission to God's command, that Isaac should be offered as a burnt-offering upon Mount Moriah, a sign of the Great Sacrifice long afterwards, when God did indeed provide Himself a Lamb. When Abraham bought the Cave of Machpelah for a, burial-place, it was in the full certainty that though he was now a stranger in the land, it would be his children's home; and it was there that he and the other patriarchs were buried after their long and faithful pilgrimage. Isaac's wife, Rebekah, was fetched from Abraham's former home, in Mesopotamia, that he might not be corrupted by marrying a Canaanite. Between his two sons, Esau and Jacob, there was again a choice; for God had prophesied that the elder should serve the younger, and Esau did not value the birthright which would have made him heir to no lands that would enrich himself, and to a far-off honour that he did not understand. So despising the promises of God, he made his right over to his brother for a little food, when he was hungry, and though he repented with tears when it was too late, he could not win back what he had once thrown away.