Nearly two thousand years rolled by after this statement before anything further was promised.
[304]Then unto Abraham Jehovah called and made him the promise: "In thy seed shall all the families of the earth be blessed".

This was another reference to the mystery; but that promise was not understood in its proper light.

Abraham believed God would bless the human race, but he did not understand just the manner in which it would be done.

At the time of this promise Abraham had no children.

Several years more passed and then Isaac, Abraham's first legitimate son, was born.