Genesis 16:1
Now Sarai Abram's wife bore him no children: and she had an handmaid, an Egyptian, whose name was Hagar.
Nave's Topical Index

Genesis 21:9-16
And Sarah saw the son of Hagar the Egyptian, which she had born to Abraham, mocking.
Nave's Topical Index

What is the House of Yahweh? | GotQuestions.org

What is a concubine? Why did God allow men to have concubines in the Bible? | GotQuestions.org

Does the Bible truly teach monogamy / monogamous relationships? | GotQuestions.org

Polygamy: Dictionary and Thesaurus | Clyx.com

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