An internet search didn't produce an author. Apparently it's unknown.
http://onchong.blogspot.com/2008/04/vengeance-is-not-ours-its-gods.html
author of vengeance is not ours it's gog's
2 answers
The original quote comes from the Bible: Romans 12:19.
"Vengeance is mine; I will repay, saith the Lord."
"http://bible.cc/romans/12-19.htm
"Vengeance is mine; I will repay, saith the Lord."
"http://bible.cc/romans/12-19.htm