Matthew 23:31-35

So you are witnessing against yourselves that you are the descendants of those who murdered the prophets.

Luke 11:50-51

so that the blood of all the prophets that has been shed from the creation of the world may be charged against the men of this age --

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
So you are witnessing against yourselves that you are the descendants of those who murdered the prophets.
Luke 11:50
so that the blood of all the prophets that has been shed from the creation of the world may be charged against the men of this age --