The Bondwoman and the Free Woman

Galatians 4:22 NASB
For it is written that Abraham had two sons . . .
Actually, did you know that Abraham had more than two sons? (Genesis 25:1-2)
But for the purposes of this illustration, we're concerned with his first two sons, the ones he had after a long time of no children. Who were these two sons?
What were the circumstances of the birth of the first son?
Was this the son that God had talked about when He spoke to Abraham in Genesis 15:4?
one by the bondwoman and one by the free woman.
Who was the bondwoman? Who was her son?
Who was the free woman? Who was her son?
If you were to look up "free," you'd learn that it means unrestrained, as a citizen in contrast to a slave. When you hear the word "unrestrained," what does it remind you of that we read in Galatinas 3:23?
Why do you think Paul used the terms "bondwoman" and "free woman" instead of their names?
Now, reread Galatians 3:2-6. Do you see any relationship between Galatians 4:22 and these verses?

What has God promised you? Will God's promise to you be fulfilled by the Spirit (divinely) or by works of the Law (humanly)? How will knowing the answer to that question help you to live your life?