Deuteronomy 21:15

If a man have two wives, the one beloved, and the other hated, and they have borne him children, both the beloved and the hated; and if the firstborn son be hers who was hated;

Genesis 29:33

She conceived again, and bore a son, and said, "Because the LORD has heard that I am hated, he has therefore given me this son also." She named him Simeon.

1 Samuel 1:4-5

When the day came that Elkanah sacrificed, he gave to Peninnah his wife, and to all her sons and her daughters, portions:

Genesis 29:18

Jacob loved Rachel. He said, "I will serve you seven years for Rachel, your younger daughter."

Genesis 29:20

Jacob served seven years for Rachel. They seemed to him but a few days, for the love he had for her.

Genesis 29:30-31

He went in also to Rachel, and he loved also Rachel more than Leah, and served with him yet seven other years.

Treasury of Scripture Knowledge

Summary

If a man have two wives, one beloved, and another hated, and they have born him children, both the beloved and the hated; and if the firstborn son be hers that was hated:

Bible References

Two wives

Genesis 29:18
Jacob loved Rachel. He said, "I will serve you seven years for Rachel, your younger daughter."
1 Samuel 1:4
When the day came that Elkanah sacrificed, he gave to Peninnah his wife, and to all her sons and her daughters, portions: