6It is not as though the word of God had failed. For not all Israelites truly belong to Israel, 7and not all of Abraham’s children are his true descendants; but “It is through Isaac that descendants shall be named for you.” 8This means that it is not the children of the flesh who are the children of God, but the children of the promise are counted as descendants. 9For this is what the promise said, “About this time I will return and Sarah shall have a son.” 10Nor is that all; something similar happened to Rebecca when she had conceived children by one husband, our ancestor Isaac. 11Even before they had been born or had done anything good or bad (so that God’s purpose of election might continue, 12not by works but by his call) she was told, “The elder shall serve the younger.” 13As it is written, “I have loved Jacob, but I have hated Esau.”
14What then are we to say? Is there injustice on God’s part? By no means! 15For he says to Moses, “I will have mercy on whom I have mercy, and I will have compassion on whom I have compassion.” 16So it depends not on human will or exertion, but on God who shows mercy. 17For the scripture says to Pharaoh, “I have raised you up for the very purpose of showing my power in you, so that my name may be proclaimed in all the earth.” 18So then he has mercy on whomever he chooses, and he hardens the heart of whomever he chooses.
From the oremus Bible Browser https://bible.oremus.org v2.9.2 30 June 2021.