Matthew 23:31-35

whereby you yourselves own that ye are indeed the children of those who killed the prophets,

Luke 11:50-51

" so that the blood of all the prophets, which has been shed since the creation of the world, may be required of this generation,

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

Matthew 23:31
whereby you yourselves own that ye are indeed the children of those who killed the prophets,
Luke 11:50
" so that the blood of all the prophets, which has been shed since the creation of the world, may be required of this generation,