TSK
Treasury of Scripture Knowledge references in NET.
God said,“No, Sarah your wife is going to bear you a son, and you will name him Isaac. I will confirm my covenant with him as a perpetual covenant for his descendants after him.
But God said to Abraham,“Do not be upset about the boy or your slave wife. Do all that Sarah is telling you because through Isaac your descendants will be counted.
Jacob and Esau This is the account of Isaac, the son of Abraham.Abraham became the father of Isaac.
Abraham was the father of Isaac, Isaac the father of Jacob, Jacob the father of Judah and his brothers,
nor are all the children Abraham’s true descendants; rather“through Isaac will your descendants be counted.”