And that tells you that the emphasis in that text is the fact that Isaac was the ONLY UNIQUE son of Abraham.
Yes, Isaac was a descendant of Abraham, but that is NOT the emphasis here.
If the author wanted to stress the fact that Isaac was simply a descendant of Abraham then he would have used a different word: "gennaó" that simply means 'to give birth to'.
This word "gennaó" is the basis of the word used in the begets passages found in both Matthew and Luke where the human lines of descent of Jesus is detailed.
Yes, Isaac was a descendant of Abraham, but that is NOT the emphasis here.
If the author wanted to stress the fact that Isaac was simply a descendant of Abraham then he would have used a different word: "gennaó" that simply means 'to give birth to'.
This word "gennaó" is the basis of the word used in the begets passages found in both Matthew and Luke where the human lines of descent of Jesus is detailed.
יָחִיד yâchîyd, yaw-kheed'; from H3161; properly, united, i.e. sole; by implication, beloved; also lonely; (feminine) the life (as not to be replaced):—darling, desolate, only (child, son), solitary.