Judges 3:6

And they took their daughters to be their wives, and gave their daughters to their sons, and served their gods.

Exodus 34:16

and lest you take from their daughters for your sons, and their daughters go whoring after their gods and make your sons go whoring after their gods.

Deuteronomy 7:3-4

Nor shall you make marriages with them. You shall not give your daughter to his son, nor shall you take his daughter to your son.

1 Kings 11:1-5

And King Solomon loved many foreign women, even the daughter of Pharaoh, Moabites, Ammonites, Edomites, Sidonians, Hittites;

Ezra 9:11-12

which You commanded by Your servants the prophets, saying, The land into which you go to possess it, is an unclean land with the filthiness of the people of the lands, with their abominations which have filled it from one end to the other with their uncleanness.

Nehemiah 13:23-27

In those days I also saw Jews who lived with women from Ashdod, Ammon, and from Moab.

Ezekiel 16:3

And say, So says the Lord Jehovah to Jerusalem, Your origin and your birth is of the land of Canaan. Your father was an Amorite, and your mother a Hittite.

Treasury of Scripture Knowledge

Summary

And they took their daughters to be their wives, and gave their daughters to their sons, and served their gods.

Bible References

General references

Exodus 34:16
and lest you take from their daughters for your sons, and their daughters go whoring after their gods and make your sons go whoring after their gods.
Deuteronomy 7:3
Nor shall you make marriages with them. You shall not give your daughter to his son, nor shall you take his daughter to your son.
1 Kings 11:1
And King Solomon loved many foreign women, even the daughter of Pharaoh, Moabites, Ammonites, Edomites, Sidonians, Hittites;
Ezra 9:11
which You commanded by Your servants the prophets, saying, The land into which you go to possess it, is an unclean land with the filthiness of the people of the lands, with their abominations which have filled it from one end to the other with their uncleanness.
Nehemiah 13:23
In those days I also saw Jews who lived with women from Ashdod, Ammon, and from Moab.
Ezekiel 16:3
And say, So says the Lord Jehovah to Jerusalem, Your origin and your birth is of the land of Canaan. Your father was an Amorite, and your mother a Hittite.