Isa 51:2, Rom 9:8 | ESV | STEP | Look to Abraham your father and to Sarah who bore you; for he was but one when I called him, that I might bless him and multiply him.

Isaiah 51:2

2 Look to Abraham your father
and to Sarah who bore you;
for ^ahe was but one when I called him,
that I might bless him and multiply him.

8 This means that it is not the children of the flesh who are the children of God, but ^bthe children of the promise are counted as offspring.