Galatians 4:22

It is written, that Abraham had two sons, one by the slave woman, and one by the freewoman.

Genesis 16:15

Hagar bore Abram a son. Abram gave the name Ishmael to the son she had borne.

Genesis 16:2-4

She said to Abram: Jehovah has kept me from having children. Go sleep with my maidservant. Perhaps I can build a family through her. Abram agreed to what Sarai said.

Genesis 21:1-2

Jehovah was gracious to Sarah, as he had said. Jehovah did for Sarah what he had promised.

Genesis 21:10

She said to Abraham: Get rid of that slave woman and her son.

Treasury of Scripture Knowledge

Summary

For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman.

Bible References

That

Genesis 16:2
She said to Abram: Jehovah has kept me from having children. Go sleep with my maidservant. Perhaps I can build a family through her. Abram agreed to what Sarai said.
Genesis 21:1
Jehovah was gracious to Sarah, as he had said. Jehovah did for Sarah what he had promised.