1 Kings 11:3

He had seven hundred wives, daughters of kings, and three hundred other wives. His wives influenced his heart to turn away.

2 Samuel 5:13-16

David left Hebron and moved to Jerusalem. He married many women from Jerusalem, and he had a lot of children.

Judges 8:30-31

He had many wives and seventy sons.

Judges 9:5

He went to his father's house at Ophrah. There on top of a single stone he killed his seventy brothers, Gideon's sons. Gideon's youngest son Jotham hid and therefore was not killed.

2 Samuel 3:2-5

Sons were born to David while he was in Hebron. His first son was Amnon, born to Ahinoam from Jezreel.

2 Chronicles 11:21

Rehoboam loved Maacah, Absalom's granddaughter, more than all his other wives and concubines. He had eighteen wives and sixty concubines. He fathered twenty-eight sons and sixty daughters.

Ecclesiastes 7:28

For I am still seeking and have not found. One man among a thousand I have found; but a woman among all those I have not found.

Treasury of Scripture Knowledge

Summary

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

General references

Bible References

Seven hundred

Judges 8:30
He had many wives and seventy sons.
Judges 9:5
He went to his father's house at Ophrah. There on top of a single stone he killed his seventy brothers, Gideon's sons. Gideon's youngest son Jotham hid and therefore was not killed.
2 Samuel 3:2
Sons were born to David while he was in Hebron. His first son was Amnon, born to Ahinoam from Jezreel.
2 Samuel 5:13
David left Hebron and moved to Jerusalem. He married many women from Jerusalem, and he had a lot of children.
2 Chronicles 11:21
Rehoboam loved Maacah, Absalom's granddaughter, more than all his other wives and concubines. He had eighteen wives and sixty concubines. He fathered twenty-eight sons and sixty daughters.
Ecclesiastes 7:28
For I am still seeking and have not found. One man among a thousand I have found; but a woman among all those I have not found.

General references

Exodus 34:16
You might take some of his daughters for your sons, and his daughters might commit spiritual immorality (fornication) with their gods and cause your sons also to commit spiritual immorality with their gods.
Judges 3:6
They intermarried with them and worshiped their gods.