Romans 9:7-9

9:7 Neither, because they are the seed of Abraham, [are they] all children: but, In Isaac shall thy seed be called. 9:8 That is, They which are the children of the flesh, these [are] not the children of God: but the children of the promise are counted for the seed. 9:9 For this [is] the word of promise, At this time will I come, and Sara shall have a son.