Ezra 9:2

for they have taken of their daughters for themselves and for their sons, and have mingled the holy seed with the peoples of the lands; and the hand of the princes and rulers has been chief in this unfaithfulness.

Exodus 22:31

And ye shall be holy men unto me; and ye shall not eat flesh torn in the field: ye shall cast it to the dog.

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.

Ezra 10:18-44

And among the sons of the priests there were found that had taken foreign wives, of the sons of Jeshua the son of Jozadak, and his brethren: Maaseiah, and Eliezer, and Jarib, and Gedaliah.

Nehemiah 13:23-24

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

2 Corinthians 6:14

Be not diversely yoked with unbelievers; for what participation is there between righteousness and lawlessness? or what fellowship of light with darkness?

Deuteronomy 7:6

For a holy people art thou unto Jehovah thy God: Jehovah thy God hath chosen thee to be unto him a people for a possession, above all the peoples that are upon the face of the earth.

Deuteronomy 14:2

For thou art a holy people unto Jehovah thy God, and thee hath Jehovah chosen for a people of possession unto himself, out of all the peoples that are upon the face of the earth.

Ezra 10:2

And Shechaniah the son of Jehiel, of the sons of Elam, answered and said to Ezra, We have acted unfaithfully toward our God, and have taken foreign wives of the peoples of the land; yet now there is hope for Israel concerning this thing.

Genesis 6:2

that the sons of God saw the daughters of men that they were fair, and took themselves wives of all that they chose.

Exodus 19:6

and ye shall be to me a kingdom of priests, and a holy nation. These are the words which thou shalt speak to the children of Israel.

Deuteronomy 7:1-4

When Jehovah thy God shall bring thee into the land whither thou goest to possess it, and shall cast out many nations from before thee, the Hittites, and the Girgashites, and the Amorites, and the Canaanites, and the Perizzites, and the Hivites, and the Jebusites, seven nations greater and mightier than thou,

Nehemiah 13:3-4

And it came to pass, when they heard the law, that they separated from Israel all the mixed multitude.

Nehemiah 13:17

And I contended with the nobles of Judah, and said to them, What evil thing is this which ye do, profaning the sabbath day?

Nehemiah 13:28

And one of the sons of Joiada, the son of Eliashib the high priest, was son-in-law to Sanballat the Horonite; and I chased him from me.

Isaiah 6:13

But a tenth part shall still be therein, and it shall return and be eaten; as the terebinth and as the oak whose trunk remaineth after the felling: the holy seed shall be the trunk thereof.

Malachi 2:11

Judah hath dealt unfaithfully, and an abomination is committed in Israel and in Jerusalem; for Judah hath profaned the sanctuary of Jehovah which he loved, and hath married the daughter of a strange god.

Malachi 2:15

And did not one make them? and the remnant of the Spirit was his. And wherefore the one? He sought a seed of God. Take heed then to your spirit, and let none deal unfaithfully against the wife of his youth,

1 Corinthians 7:14

For the unbelieving husband is sanctified in the wife, and the unbelieving wife is sanctified in the brother; since otherwise indeed your children are unclean, but now they are holy.

Treasury of Scripture Knowledge

Summary

For they have taken of their daughters for themselves, and for their sons: so that the holy seed have mingled themselves with the people of those lands: yea, the hand of the princes and rulers hath been chief in this trespass.

Bible References

Taken of their

Ezra 10:18
And among the sons of the priests there were found that had taken foreign wives, of the sons of Jeshua the son of Jozadak, and his brethren: Maaseiah, and Eliezer, and Jarib, and Gedaliah.
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 7:1
When Jehovah thy God shall bring thee into the land whither thou goest to possess it, and shall cast out many nations from before thee, the Hittites, and the Girgashites, and the Amorites, and the Canaanites, and the Perizzites, and the Hivites, and the Jebusites, seven nations greater and mightier than thou,
Nehemiah 13:23
In those days also I saw Jews that had married wives of Ashdod, of Ammon, and of Moab.
Malachi 2:11
Judah hath dealt unfaithfully, and an abomination is committed in Israel and in Jerusalem; for Judah hath profaned the sanctuary of Jehovah which he loved, and hath married the daughter of a strange god.

The holy seed

Exodus 19:6
and ye shall be to me a kingdom of priests, and a holy nation. These are the words which thou shalt speak to the children of Israel.
Exodus 22:31
And ye shall be holy men unto me; and ye shall not eat flesh torn in the field: ye shall cast it to the dog.
Deuteronomy 7:6
For a holy people art thou unto Jehovah thy God: Jehovah thy God hath chosen thee to be unto him a people for a possession, above all the peoples that are upon the face of the earth.
Deuteronomy 14:2
For thou art a holy people unto Jehovah thy God, and thee hath Jehovah chosen for a people of possession unto himself, out of all the peoples that are upon the face of the earth.
Isaiah 6:13
But a tenth part shall still be therein, and it shall return and be eaten; as the terebinth and as the oak whose trunk remaineth after the felling: the holy seed shall be the trunk thereof.
Malachi 2:15
And did not one make them? and the remnant of the Spirit was his. And wherefore the one? He sought a seed of God. Take heed then to your spirit, and let none deal unfaithfully against the wife of his youth,
1 Corinthians 7:14
For the unbelieving husband is sanctified in the wife, and the unbelieving wife is sanctified in the brother; since otherwise indeed your children are unclean, but now they are holy.

Mingled

Genesis 6:2
that the sons of God saw the daughters of men that they were fair, and took themselves wives of all that they chose.
Nehemiah 13:3
And it came to pass, when they heard the law, that they separated from Israel all the mixed multitude.
2 Corinthians 6:14
Be not diversely yoked with unbelievers; for what participation is there between righteousness and lawlessness? or what fellowship of light with darkness?

The hand

Ezra 10:18
And among the sons of the priests there were found that had taken foreign wives, of the sons of Jeshua the son of Jozadak, and his brethren: Maaseiah, and Eliezer, and Jarib, and Gedaliah.
Nehemiah 13:4
And before this, Eliashib the priest, who had the oversight of the chambers of the house of our God, a kinsman of Tobijah,

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;
Nehemiah 10:30
and that we would not give our daughters to the peoples of the land, nor take their daughters for our sons: