Deuteronomy 21:15
If a man has two wives, the one beloved, and the other regarded inferior, and they have borne him sons, both the beloved and the one regarded inferior, and if the first-born son be hers who was regarded inferior,
Genesis 29:33
And she conceived again, and bore a son, and said, Because LORD has heard that I am regarded inferior, he has therefore given me this [son] also. And she called his name Simeon.
1 Samuel 1:4-5
And 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
And Jacob loved Rachel, and he said, I will serve thee seven years for Rachel thy younger daughter.
Genesis 29:20
And Jacob served seven years for Rachel. And they seemed to him but a few days, for the love he had for her.
Genesis 29:30-31
And he also went in to Rachel, and also he loved Rachel more than Leah, and served with him yet seven other years.