Romans 3:3-4 For what if some did not believe? shall their unbelief make the faith of God without effect?

KJV⁽ⁱ⁾ 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.