Genesis 21:10-14
Why she said to Abraham, Cast out this female slave and her son: for the son of this female slave shall not be heir with my son, even with Isaac.
Nave's Topical Index—AKJV

Galatians 4:22-30
For it is written, that Abraham had two sons, the one by a female slave, the other by a free woman.
Nave's Topical Index—AKJV