Thematic Bible: Sends hagar and ishmael away

So she said to Abraham, "Drive out this slave with her son, for the son of this slave will not be a co-heir with my son Isaac!" Now this was a very difficult thing for Abraham because of his son. But God said to Abraham, "Do not be concerned about the boy and your slave. Whatever Sarah says to you, listen to her, because your offspring will be traced through Isaac. read more.
But I will also make a nation of the slave's son because he is your offspring." Early in the morning Abraham got up, took bread and a waterskin, [put them] on Hagar's shoulders, and sent her and the boy away. She left and wandered in the Wilderness of Beer-sheba.

For it is written that Abraham had two sons, one by a slave and the other by a free woman. But the one by the slave was born according to the flesh, while the one by the free woman was born as the result of a promise. These things are illustrations, for the women represent the two covenants. One is from Mount Sinai and bears children into slavery-this is Hagar. read more.
Now Hagar is Mount Sinai in Arabia and corresponds to the present Jerusalem, for she is in slavery with her children. But the Jerusalem above is free, and she is our mother. For it is written: Rejoice, O barren woman who does not give birth. Break forth and shout, you who are not in labor, for the children of the desolate are many, more numerous than those of the woman who has a husband. Now you, brothers, like Isaac, are children of promise. But just as then the child born according to the flesh persecuted the one born according to the Spirit, so also now. But what does the Scripture say? Throw out the slave and her son, for the son of the slave will never inherit with the son of the free woman.