two
Genesis 4:19
And Lamech took unto him two wives: the name of the one was Adah, and the name of the other Zillah.
Genesis 4:23
And Lamech said unto his wives, "Adah and Zillah, hear my voice; ye wives of Lamech, hearken unto my speech! For I have slain a man for my wounding, and a young man for my hurt.
Genesis 29:23-29
23
And it came to pass in the evening, that he took Leah his daughter and brought her to him; and he went in unto her.
24
And Laban gave unto his daughter Leah, Zilpah his maid for a handmaid.
25
And it came to pass that in the morning, behold, it was Leah; and he said to Laban, "What is this thou hast done unto me? Did not I serve with thee for Rachel? Why then hast thou beguiled me?"
26
And Laban said, "It must not be so done in our country, to give the younger before the firstborn.
27
Fulfill her week, and we will give thee this other also, for which service thou shalt serve with me yet seven other years."
28
And Jacob did so, and fulfilled her week; and he gave him Rachel his daughter for a wife also.
29
And Laban gave to Rachel his daughter Bilhah his handmaid to be her maid.
Judges 8:30
And Gideon had threescore and ten sons of his body begotten, for he had many wives.
Matthew 19:8
He said unto them, "Moses, because of the hardness of your hearts, suffered you to put away your wives, but from the beginning it was not so.
but
Genesis 16:1
Now Sarai, Abram's wife, bore him no children; and she had a handmaid, an Egyptian, whose name was Hagar.
Genesis 16:2
And Sarai said unto Abram, "Behold now, the LORD hath restrained me from bearing. I pray thee, go in unto my maid. It may be that I may obtain children by her." And Abram hearkened to the voice of Sarai.
Genesis 25:21
And Isaac entreated the LORD for his wife, because she was barren; and the LORD was entreated by him, and Rebekah his wife conceived.
Genesis 29:31
And when the LORD saw that Leah was hated, he opened her womb; but Rachel was barren.
Judges 13:2
And there was a certain man of Zorah, of the family of the Danites, whose name was Manoah; and his wife was barren and bore not.
Luke 1:7
And they had no child because Elizabeth was barren, and they both were now well stricken in years.