God said, “No, but Sarah your wife shall bear you a son, and you shall call his name Isaac. I will establish my covenant with him as an everlasing covenant for his descendants after him.
But to the sons of his concubines Abraham gave gifts, and while he was still living he sent them away from his son Isaac, eastward to the east country.
They went out from us, but they were not of us; for if they had been of us, they would have continued with us; but they went out, that it might be plain that they all are not of us.
And Gilead's wife also bore him sons; and when his wife's sons grew up, they thrust Jephthah out, and said to him, “You shall not inherit in our father's house; for you are the son of another woman.”