Rom 3:3-7
3 For what if some did not believe? shall their unbelief make the faith of God without effect? 
4 God forbid: yea, let God be true, but every man a liar; as it is written, That thou mightest be justified in thy sayings, and mightest overcome when thou art judged. 
5 But if our unrighteousness commend the righteousness of God, what shall we say? Is God unrighteous who taketh vengeance? (I speak as a man) 
6 God forbid: for then how shall God judge the world? 
7 For if the truth of God hath more abounded through my lie unto his glory; why yet am I also judged as a sinner?

"Let God Be True But Every Man A Liar"