Ezra 9:2

for they have taken of their daughters, for themselves and for their sons, so that the holy seed have intermingled themselves among the peoples of the lands, - and, the hand of the rulers and the deputies, hath, in this unfaithfulness, been, foremost.

Exodus 22:31

Holy men, therefore shall ye truly become to me, - and flesh in the field torn to pieces, shall ye not eat, to the dogs, shall ye cast it.

Exodus 34:16

And thou wilt take of his daughters for thy sons, - And his daughters will go unchastely after their gods, And will cause thy sons to go unchastely after their gods.

Ezra 10:18-44

Now there were found, of the sons of the priests, who had married foreign women, - of the sons of Jeshua son of Jozadak, and his brethren, Maaseiah, and Eliezer, and Jarib, and Gedaliah;

Nehemiah 13:23-24

Moreover, in these days, saw I the Jews who had married women of Ashdod, of Ammon, of Moab;

2 Corinthians 6:14

Be not getting diversely yoked with unbelievers; for what partnership have righteousness and lawlessness? Or what fellowship hath light with darkness?

Deuteronomy 7:6

For a holy people, art thou unto Yahweh thy God: of thee, hath Yahweh thy God, made choice, that thou shouldest become his people as a treasure, above all the peoples that are on the face of the ground:

Deuteronomy 14:2

For, a holy people, thou art unto Yahweh thy God, - and, of thee, did Yahweh make choice, that thou shouldest become his people as a treasure, above all the peoples that are on the face of the ground.

Ezra 10:2

Then responded Shecaniah son of Jehiel of the sons of Elam, and said unto Ezra, We, have been faithful with our God, and have married foreign women from among 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, - so they took to themselves wives of whomsoever they chose,

Exodus 19:6

But, ye, shall be mine, As a kingdom of priests, And a holy nation. These, are the words, which thou shalt speak unto the sons of Israel.

Deuteronomy 7:1-4

When Yahweh thy God shall bring thee into the land which thou art going in to possess, and shall clear away 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 in number and stronger than thou;

Nehemiah 13:3-4

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

Nehemiah 13:17

so I contended with the nobles of Judah, - and said unto them, What is this wicked thing which, ye, are doing, and profaning the sabbath day?

Nehemiah 13:28

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

Isaiah 6:13

Yet still shall there be in it a tenth, Though it again be consumed, - Like an oak and like a terebinth Which when felled, have a stock in them, A holy seed, shall be the stock thereof. Courage.

Malachi 2:11

Judah, hath dealt treacherously, and, an abomination, hath been wrought in Israel, and in Jerusalem, - for Judah, had profaned, the holy place of Yahweh, which he had loved, and hath taken to himself the daughter of a foreign GOD.

Malachi 2:15

Now was it not, One, who made you who had, the residue of the spirit? What, then, of that One? He was seeking a godly seed. Therefore should ye take heed to your spirit, and, with the wife of thy youth, do not thou deal treacherously.

1 Corinthians 7:14

For the husband that believeth not is hallowed in the wife, and the wife that believeth not is hallowed in the brother: else were, your children, impure, but, now, are they, pure.

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
Now there were found, of the sons of the priests, who had married foreign women, - of the sons of Jeshua son of Jozadak, and his brethren, Maaseiah, and Eliezer, and Jarib, and Gedaliah;
Exodus 34:16
And thou wilt take of his daughters for thy sons, - And his daughters will go unchastely after their gods, And will cause thy sons to go unchastely after their gods.
Deuteronomy 7:1
When Yahweh thy God shall bring thee into the land which thou art going in to possess, and shall clear away 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 in number and stronger than thou;
Nehemiah 13:23
Moreover, in these days, saw I the Jews who had married women of Ashdod, of Ammon, of Moab;
Malachi 2:11
Judah, hath dealt treacherously, and, an abomination, hath been wrought in Israel, and in Jerusalem, - for Judah, had profaned, the holy place of Yahweh, which he had loved, and hath taken to himself the daughter of a foreign GOD.

The holy seed

Exodus 19:6
But, ye, shall be mine, As a kingdom of priests, And a holy nation. These, are the words, which thou shalt speak unto the sons of Israel.
Exodus 22:31
Holy men, therefore shall ye truly become to me, - and flesh in the field torn to pieces, shall ye not eat, to the dogs, shall ye cast it.
Deuteronomy 7:6
For a holy people, art thou unto Yahweh thy God: of thee, hath Yahweh thy God, made choice, that thou shouldest become his people as a treasure, above all the peoples that are on the face of the ground:
Deuteronomy 14:2
For, a holy people, thou art unto Yahweh thy God, - and, of thee, did Yahweh make choice, that thou shouldest become his people as a treasure, above all the peoples that are on the face of the ground.
Isaiah 6:13
Yet still shall there be in it a tenth, Though it again be consumed, - Like an oak and like a terebinth Which when felled, have a stock in them, A holy seed, shall be the stock thereof. Courage.
Malachi 2:15
Now was it not, One, who made you who had, the residue of the spirit? What, then, of that One? He was seeking a godly seed. Therefore should ye take heed to your spirit, and, with the wife of thy youth, do not thou deal treacherously.
1 Corinthians 7:14
For the husband that believeth not is hallowed in the wife, and the wife that believeth not is hallowed in the brother: else were, your children, impure, but, now, are they, pure.

Mingled

Genesis 6:2
that the sons of God saw the daughters of men! that they were, fair, - so they took to themselves wives of whomsoever they chose,
Nehemiah 13:3
So it came to pass, when they had heard the law, - that they separated all the mixed multitude from Israel.
2 Corinthians 6:14
Be not getting diversely yoked with unbelievers; for what partnership have righteousness and lawlessness? Or what fellowship hath light with darkness?

The hand

Ezra 10:18
Now there were found, of the sons of the priests, who had married foreign women, - of the sons of Jeshua son of Jozadak, and his brethren, Maaseiah, and Eliezer, and Jarib, and Gedaliah;
Nehemiah 13:4
Now, before this, Eliashib the priest, who was set over a chamber of the house of God, was allied unto Tobiah;

General references

Exodus 34:16
And thou wilt take of his daughters for thy sons, - And his daughters will go unchastely after their gods, And will cause thy sons to go unchastely after their gods.
Deuteronomy 7:3
neither shalt thou intermarry with them, - thy daughter, shalt thou not give unto his son, nor his daughter, shalt thou take for thy son;
Nehemiah 10:30
and that we would not give our daughters unto the peoples of the land, - and, their daughters, would we not take for our sons;