'Witnesses' in the Bible

I invoke heaven and earth as witnesses against you today that you will surely and swiftly be removed from the very land you are about to cross the Jordan to possess. You will not last long there because you will surely be annihilated.

At the testimony of two or three witnesses they must be executed. They cannot be put to death on the testimony of only one witness.

The witnesses must be first to begin the execution, and then all the people are to join in afterward. In this way you will purge evil from among you.

A single witness may not testify against another person for any trespass or sin that he commits. A matter may be legally established only on the testimony of two or three witnesses.