2 Chronicles 11:21

And Rehoboam loved Maacah the daughter of Absalom above all his wives and his concubines. For he took eighteen wives, and thirty concubines, and begot twenty-eight sons and thirty daughters.

Deuteronomy 17:17

Neither shall he multiply wives to himself, that his heart turn not away. Neither shall he greatly multiply to himself silver and gold.

2 Samuel 3:2-5

And sons were born to David in Hebron: and his first-born was Amnon, of Ahinoam the Jezreelitess,

Judges 8:30

And Gideon had seventy sons begotten from his body, for he had many wives.

2 Samuel 5:13

And David took for him more concubines and wives out of Jerusalem, after he came from Hebron, and there were yet sons and daughters born to David.

1 Kings 11:3

And he had seven hundred wives, princesses, and three hundred concubines. And his wives turned away his heart.

1 Chronicles 3:1-9

Now these were the sons of David who were born to him in Hebron: the first-born, Amnon, of Ahinoam the Jezreelitess; the second, Daniel, of Abigail the Carmelitess;

2 Chronicles 11:23

And he dealt wisely, and dispersed all his sons throughout all the lands of Judah and Benjamin, to every fortified city. And he gave them provisions in abundance. And he sought [for them] many wives.

Song of Songs 6:8-9

There are sixty queens, and eighty concubines, and virgins without number.

Treasury of Scripture Knowledge

Summary

And Rehoboam loved Maachah the daughter of Absalom above all his wives and his concubines: (for he took eighteen wives, and threescore concubines; and begat twenty and eight sons, and threescore daughters.)

Bible References

Eighteen wives

2 Chronicles 11:23
And he dealt wisely, and dispersed all his sons throughout all the lands of Judah and Benjamin, to every fortified city. And he gave them provisions in abundance. And he sought [for them] many wives.
Deuteronomy 17:17
Neither shall he multiply wives to himself, that his heart turn not away. Neither shall he greatly multiply to himself silver and gold.
Judges 8:30
And Gideon had seventy sons begotten from his body, for he had many wives.
2 Samuel 3:2
And sons were born to David in Hebron: and his first-born was Amnon, of Ahinoam the Jezreelitess,
2 Samuel 5:13
And David took for him more concubines and wives out of Jerusalem, after he came from Hebron, and there were yet sons and daughters born to David.
1 Kings 11:3
And he had seven hundred wives, princesses, and three hundred concubines. And his wives turned away his heart.
1 Chronicles 3:1
Now these were the sons of David who were born to him in Hebron: the first-born, Amnon, of Ahinoam the Jezreelitess; the second, Daniel, of Abigail the Carmelitess;
Song of Songs 6:8
There are sixty queens, and eighty concubines, and virgins without number.

General references

Deuteronomy 21:16
then it shall be, in the day that he causes his sons to inherit that which he has, that he may not make the son of the beloved the first-born before the son of the one regarded inferior, who is the first-born.
2 Samuel 5:13
And David took for him more concubines and wives out of Jerusalem, after he came from Hebron, and there were yet sons and daughters born to David.
Song of Songs 6:8
There are sixty queens, and eighty concubines, and virgins without number.