2 Chronicles 11:21

Maacah, the daughter of Absalom, was dearer to Rehoboam than all his wives and his servant-wives: (for he had eighteen wives and sixty servant-wives, and was the father of twenty-eight sons and sixty daughters.)

Deuteronomy 17:17

And he is not to have a great number of wives, for fear that his heart may be turned away; or great wealth of silver and gold.

2 Samuel 3:2-5

While David was in Hebron he became the father of sons: the oldest was Amnon, son of Ahinoam of Jezreel;

Judges 8:30

Gideon had seventy sons, the offspring of his body; for he had a number of wives.

2 Samuel 5:13

And David took more women and wives in Jerusalem, after he had come from Hebron: and he had more sons and daughters.

1 Kings 11:3

He had seven hundred wives, daughters of kings, and three hundred other wives; and through his wives his heart was turned away.

1 Chronicles 3:1-9

Now these were David's sons, whose birth took place in Hebron: the oldest Amnon, by Ahinoam of Jezreel; the second Daniel, by Abigail the Carmelite woman;

2 Chronicles 11:23

And in his wisdom he had his sons stationed in every walled town through all the lands of Judah and Benjamin; and he gave them a great store of food, and took wives for them.

Song of Songs 6:8-9

There are sixty queens, and eighty servant-wives, and young girls 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 in his wisdom he had his sons stationed in every walled town through all the lands of Judah and Benjamin; and he gave them a great store of food, and took wives for them.
Deuteronomy 17:17
And he is not to have a great number of wives, for fear that his heart may be turned away; or great wealth of silver and gold.
Judges 8:30
Gideon had seventy sons, the offspring of his body; for he had a number of wives.
2 Samuel 3:2
While David was in Hebron he became the father of sons: the oldest was Amnon, son of Ahinoam of Jezreel;
2 Samuel 5:13
And David took more women and wives in Jerusalem, after he had come from Hebron: and he had more sons and daughters.
1 Kings 11:3
He had seven hundred wives, daughters of kings, and three hundred other wives; and through his wives his heart was turned away.
1 Chronicles 3:1
Now these were David's sons, whose birth took place in Hebron: the oldest Amnon, by Ahinoam of Jezreel; the second Daniel, by Abigail the Carmelite woman;
Song of Songs 6:8
There are sixty queens, and eighty servant-wives, and young girls without number.

General references

Deuteronomy 21:16
Then when he gives his property to his sons for their heritage, he is not to put the son of his loved one in the place of the first son, the son of the hated wife:
2 Samuel 5:13
And David took more women and wives in Jerusalem, after he had come from Hebron: and he had more sons and daughters.
Song of Songs 6:8
There are sixty queens, and eighty servant-wives, and young girls without number.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain