Numbers 35:16

The English Standar Version

"But if he struck him down with an iron object, so that he died, he is a murderer. The murderer shall be put to death.

Cross References

Ezekiel 16:38

And I will judge you as women who commit adultery and shed blood are judged, and bring upon you the blood of wrath and jealousy.

Leviticus 24:17

"Whoever takes a human life shall surely be put to death.