Judges 3:6

and they took their daughters to themselves for wives, and their own daughters they gave to their sons; and they served their gods.

Exodus 34:16

and thou take of their daughters unto thy sons, and their daughters go a whoring after their gods, and make thy sons go a whoring after their gods.

Deuteronomy 7:3-4

And thou shalt make no marriages with them: thy daughter thou shalt not give unto his son, nor take his daughter for thy son;

1 Kings 11:1-5

But king Solomon loved many foreign women, besides the daughter of Pharaoh: women of the Moabites, Ammonites, Edomites, Zidonians, Hittites;

Ezra 9:11-12

which thou hast commanded by thy servants the prophets, saying, The land, unto which ye go to possess it, is an unclean land through the filthiness of the peoples of the lands, through their abominations with which they have filled it from one end to another through their uncleanness.

Nehemiah 13:23-27

In those days also I saw Jews that had married wives of Ashdod, of Ammon, and of Moab.

Ezekiel 16:3

and say, Thus saith the Lord Jehovah unto Jerusalem: Thy birth and thy nativity is of the land of the Canaanite: thy father was an Amorite, and thy 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 thou take of their daughters unto thy sons, and their daughters go a whoring after their gods, and make thy sons go a whoring after their gods.
Deuteronomy 7:3
And thou shalt make no marriages with them: thy daughter thou shalt not give unto his son, nor take his daughter for thy son;
1 Kings 11:1
But king Solomon loved many foreign women, besides the daughter of Pharaoh: women of the Moabites, Ammonites, Edomites, Zidonians, Hittites;
Ezra 9:11
which thou hast commanded by thy servants the prophets, saying, The land, unto which ye go to possess it, is an unclean land through the filthiness of the peoples of the lands, through their abominations with which they have filled it from one end to another through their uncleanness.
Nehemiah 13:23
In those days also I saw Jews that had married wives of Ashdod, of Ammon, and of Moab.
Ezekiel 16:3
and say, Thus saith the Lord Jehovah unto Jerusalem: Thy birth and thy nativity is of the land of the Canaanite: thy father was an Amorite, and thy mother a Hittite.