Deuteronomy 21:15

'When a man hath two wives, the one loved and the other hated, and they have borne to him sons (the loved one and the hated one), and the first-born son hath been to the hated one;

Genesis 29:33

And she conceiveth again, and beareth a son, and saith, 'Because Jehovah hath heard that I am the hated one, He also giveth to me even this one;' and she calleth his name Simeon.

1 Samuel 1:4-5

And the day cometh, and Elkanah sacrificeth, and he hath given to Peninnah his wife, and to all her sons and her daughters, portions,

Genesis 29:18

And Jacob loveth Rachel, and saith, 'I serve thee seven years for Rachel thy younger daughter:'

Genesis 29:20

and Jacob serveth for Rachel seven years; and they are in his eyes as some days, because of his loving her.

Genesis 29:30-31

And he goeth in also unto Rachel, and he also loveth Rachel more than Leah; and he serveth 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
And Jacob loveth Rachel, and saith, 'I serve thee seven years for Rachel thy younger daughter:'
1 Samuel 1:4
And the day cometh, and Elkanah sacrificeth, and he hath given to Peninnah his wife, and to all her sons and her daughters, portions,