Quod ab initio non valet
Quod ab initio non valet, in tractu temporis non convalescere. What is not good in the beginning cannot be rendered good by time. Merl. Rep. verbo Regle de Droit. This, though true in general, is not universally so.
A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.