Matthew 23:31-35

Thus you witness against yourselves, that you are sons of those who murdered the prophets.

Luke 11:50-51

that the blood of all the prophets which was shed from the foundation 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
Thus you witness against yourselves, that you are sons of those who murdered the prophets.
Luke 11:50
that the blood of all the prophets which was shed from the foundation of the world may be required of this generation,