Numbers 35:33

So do not make the land where you are living unholy: for blood makes the land unholy: and there is no way of making the land free from the blood which has come on it, but only by the death of him who was the cause of it.

Micah 4:11

And now a number of nations have come together against you, and they say, Let her be made unclean and let our eyes see the fate of Zion.

Genesis 9:6

Whoever takes a man's life, by man will his life be taken; because God made man in his image.

Psalm 106:38

And gave the blood of their sons and their daughters who had done no wrong, offering them to the images of Canaan; and the land was made unclean with blood.

Leviticus 18:25

And the land itself has become unclean; so that I have sent on it the reward of its wrongdoing, and the land itself puts out those who are living in it.

Deuteronomy 21:1-8

If, in the land which the Lord your God is giving you, you come across the dead body of a man in the open country, and you have no idea who has put him to death:

Deuteronomy 21:23

Do not let his body be on the tree all night, but put it to rest in the earth the same day; for the man who undergoes hanging is cursed by God; so do not make unclean the land which the Lord your God is giving you for your heritage.

2 Kings 23:26

But still the heat of the Lord's wrath was not turned back from Judah, because of all Manasseh had done in moving him to wrath.

2 Kings 24:4

And because of the death of those who had done no wrong, for he made Jerusalem full of the blood of the upright; and the Lord had no forgiveness for it.

Psalm 106:28

And they were joined to Baal-peor, and took part in the offerings to the dead.

Isaiah 26:21

For the Lord is coming out of his place to send punishment on the people of the earth for their evil-doing: the earth will let the blood drained out on her be seen, and will keep her dead covered no longer.

Ezekiel 22:24-27

Son of man, say to her, You are a land on which no rain or thunderstorm has come in the day of wrath.

Hosea 4:2-3

There is cursing and broken faith, violent death and attacks on property, men are untrue in married life, houses are broken into, and there is blood touching blood.

Matthew 23:31-35

So that you are witnesses against yourselves that you are the sons of those who put the prophets to death.

Luke 11:50-51

So that punishment may come on this generation for the blood of all the prophets which was given from the earliest days;

Treasury of Scripture Knowledge

Summary

So ye shall not pollute the land wherein ye are: for blood it defileth the land: and the land cannot be cleansed of the blood that is shed therein, but by the blood of him that shed it.

Bible References

It defileth

Leviticus 18:25
And the land itself has become unclean; so that I have sent on it the reward of its wrongdoing, and the land itself puts out those who are living in it.
Deuteronomy 21:1
If, in the land which the Lord your God is giving you, you come across the dead body of a man in the open country, and you have no idea who has put him to death:
2 Kings 23:26
But still the heat of the Lord's wrath was not turned back from Judah, because of all Manasseh had done in moving him to wrath.
2 Kings 24:4
And because of the death of those who had done no wrong, for he made Jerusalem full of the blood of the upright; and the Lord had no forgiveness for it.
Psalm 106:28
And they were joined to Baal-peor, and took part in the offerings to the dead.
Isaiah 26:21
For the Lord is coming out of his place to send punishment on the people of the earth for their evil-doing: the earth will let the blood drained out on her be seen, and will keep her dead covered no longer.
Ezekiel 22:24
Son of man, say to her, You are a land on which no rain or thunderstorm has come in the day of wrath.
Hosea 4:2
There is cursing and broken faith, violent death and attacks on property, men are untrue in married life, houses are broken into, and there is blood touching blood.
Micah 4:11
And now a number of nations have come together against you, and they say, Let her be made unclean and let our eyes see the fate of Zion.
Matthew 23:31
So that you are witnesses against yourselves that you are the sons of those who put the prophets to death.
Luke 11:50
So that punishment may come on this generation for the blood of all the prophets which was given from the earliest days;

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain