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
He acted wisely and distributed some of his sons throughout the territories of Judah and Benjamin to all the fortified cities. He gave them abundant provisions, and he sought many wives for them.
Deuteronomy 17:17
He shall not acquire multiple wives for himself, or else his heart will turn away [from God]; nor [for the same reason] shall he acquire great amounts of silver and gold.
Judges 8:30
Now Gideon had seventy sons born to him, because he had many wives.
2 Samuel 3:2
Sons were born to David in Hebron: his firstborn was Amnon, by Ahinoam of Jezreel;
2 Samuel 5:13
David took more concubines and wives from Jerusalem, after he came from Hebron; and more sons and daughters were born to him.
1 Kings 11:3
He had seven hundred wives, princesses, and three hundred concubines, and his wives turned his heart away [from God].
1 Chronicles 3:1
These were the sons of David who were born to him in Hebron: the firstborn was Amnon, by Ahinoam the Jezreelitess; second, Daniel (Chileab), by Abigail the Carmelitess;
Song of Songs 6:8

“There are sixty queens and eighty concubines,
And maidens without number;

General references

Deuteronomy 21:16
then on the day when he wills his possessions to his sons, he cannot treat the son of his loved wife as firstborn in place of the son of the unloved wife—the [actual] firstborn.
2 Samuel 5:13
David took more concubines and wives from Jerusalem, after he came from Hebron; and more sons and daughters were born to him.
Song of Songs 6:8

“There are sixty queens and eighty concubines,
And maidens without number;