When you do something good or bad and someone it is not believed
I already have many years, and I can assure you that before was that the expression. Exactly was: " Dios come and tell " thing which, by the way, seems much more appropriate, because that God thing sees all, already know it.
An expression that invokes God as witness of truth or justice of something. This expression typically function grammatically as a consequent of a conditional sentence, which may not happen that the condition ( 41 protasis; is true and the conditioned or consequent is false, "If this is not true, that come Dios and see you " i.e., it may not happen this not be true and at the same time that Dios silver lining to see him.