Galatians 4:23

Revised Standard Version (RSV-CI)

But the son of the slave was born according to the flesh, the son of the free woman through promise.

Cross References

Hebrews 11:11

By faith Sarah herself received power to conceive, even when she was past the age, since she considered him faithful who had promised.

Romans 10:8

But what does it say? The word is near you, on your lips and in your heart (that is, the word of faith which we preach);

Galatians 4:22

For it is written that Abraham had two sons, one by a slave and one by a free woman.