King James Version
Whoso killeth any person, the murderer shall be put to death by the mouth of witnesses: but one witness shall not testify against any person to cause him to die.English Standard Version
"If anyone kills a person, the murderer shall be put to death on the evidence of witnesses. But no person shall be put to death on the testimony of one witness.Catholic Public Domain Version
The punishment of a murderer shall be based upon testimony; but no one shall be condemned upon the testimony of only one person