2 Chronicles 11:21

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

Deuteronomy 17:17

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

2 Samuel 3:2-5

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

Judges 8:30

And Gideon had seventy sons of his body begotten: for he had many wives.

2 Samuel 5:13

And David took him more concubines and wives out of Jerusalem, after he had come 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 of all his children throughout all the countries of Judah and Benjamin, to every fortified city: and he gave them provisions in abundance. And he desired 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 of all his children throughout all the countries of Judah and Benjamin, to every fortified city: and he gave them provisions in abundance. And he desired many wives.
Deuteronomy 17:17
Neither shall he multiply wives to himself, that his heart may turn not away: neither shall he greatly accumulate to himself silver and gold.
Judges 8:30
And Gideon had seventy sons of his body begotten: for he had many wives.
2 Samuel 3:2
And to David were sons born in Hebron: and his first-born was Amnon, of Ahinoam the Jezreelitess;
2 Samuel 5:13
And David took him more concubines and wives out of Jerusalem, after he had come 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, when he maketh his sons to inherit that which he hath, that he may not prefer the son of the beloved first-born, before the son of the hated, which is indeed the first-born:
2 Samuel 5:13
And David took him more concubines and wives out of Jerusalem, after he had come 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.