When Jesus quoted what we call the "thou shalt not kill" commandment, He quoted it as "thou shalt do no murder" (
Matthew 19:18). That's the way the NKJV translates it in the list of the "10 commandments" in
Exodus 20. God made "murder" illegal, but He authorized taking a life in war and taking a life in capital punishment. He also made a difference in what we today would call "manslaughter" and "murder."