Matthew 23:31 KJV
Wherefore ye be witnesses unto yourselves, that ye are the children of them which killed the prophets.
Matthew 23:31, King James Version
In context
30 And say, If we had been in the days of our fathers, we would not have been partakers with them in the blood of the prophets.
31 Wherefore ye be witnesses unto yourselves, that ye are the children of them which killed the prophets.
32 Fill ye up then the measure of your fathers.