person. soul. Hebrew. nephesh. App-13.
mouth. Put by Figure of speech Metonymy (of Cause), App-6, for the evidence given by it.
Related Commentaries of Numbers 35:30
Numbers 35:30
30 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.