Ezra 9:11

which you have commanded by your servants the prophets, saying, 'The land, to which you go to possess it, is an unclean land through the uncleanness of the peoples of the lands, through their abominations, which have filled it from one end to another with their filthiness.

Ezra 6:21

The children of Israel who had come again out of the captivity, and all such as had separated themselves to them from the filthiness of the nations of the land, to seek Yahweh, the God of Israel, ate,

Leviticus 18:24-30

"'Don't defile yourselves in any of these things: for in all these the nations which I am casting out before you were defiled.

Deuteronomy 12:31

You shall not do so to Yahweh your God: for every abomination to Yahweh, which he hates, have they done to their gods; for even their sons and their daughters do they burn in the fire to their gods.

Deuteronomy 18:12

For whoever does these things is an abomination to Yahweh: and because of these abominations Yahweh your God does drive them out from before you.

2 Kings 21:16

Moreover Manasseh shed innocent blood very much, until he had filled Jerusalem from one end to another; besides his sin with which he made Judah to sin, in doing that which was evil in the sight of Yahweh.

2 Chronicles 33:2

He did that which was evil in the sight of Yahweh, after the abominations of the nations whom Yahweh cast out before the children of Israel.

Ezra 9:1

Now when these things were done, the princes drew near to me, saying, "The people of Israel, and the priests and the Levites, have not separated themselves from the peoples of the lands, [doing] according to their abominations, even of the Canaanites, the Hittites, the Perizzites, the Jebusites, the Ammonites, the Moabites, the Egyptians, and the Amorites.

Ezekiel 36:25-27

I will sprinkle clean water on you, and you shall be clean: from all your filthiness, and from all your idols, will I cleanse you.

2 Corinthians 7:1

Having therefore these promises, beloved, let us cleanse ourselves from all defilement of flesh and spirit, perfecting holiness in the fear of God.

Treasury of Scripture Knowledge

Summary

Which thou hast commanded by thy servants the prophets, saying, The land, unto which ye 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 another with their uncleanness.

General references

Bible References

The land

Ezra 9:1
Now when these things were done, the princes drew near to me, saying, "The people of Israel, and the priests and the Levites, have not separated themselves from the peoples of the lands, [doing] according to their abominations, even of the Canaanites, the Hittites, the Perizzites, the Jebusites, the Ammonites, the Moabites, the Egyptians, and the Amorites.
Leviticus 18:24
"'Don't defile yourselves in any of these things: for in all these the nations which I am casting out before you were defiled.
Deuteronomy 12:31
You shall not do so to Yahweh your God: for every abomination to Yahweh, which he hates, have they done to their gods; for even their sons and their daughters do they burn in the fire to their gods.
Deuteronomy 18:12
For whoever does these things is an abomination to Yahweh: and because of these abominations Yahweh your God does drive them out from before you.
2 Chronicles 33:2
He did that which was evil in the sight of Yahweh, after the abominations of the nations whom Yahweh cast out before the children of Israel.

The filthiness

Ezra 6:21
The children of Israel who had come again out of the captivity, and all such as had separated themselves to them from the filthiness of the nations of the land, to seek Yahweh, the God of Israel, ate,
Ezekiel 36:25
I will sprinkle clean water on you, and you shall be clean: from all your filthiness, and from all your idols, will I cleanse you.
2 Corinthians 7:1
Having therefore these promises, beloved, let us cleanse ourselves from all defilement of flesh and spirit, perfecting holiness in the fear of God.

General references

Judges 3:6
and they took their daughters to be their wives, and gave their own daughters to their sons and served their gods.