Ubi lex aliquem cogit ostendere causam

Ubi lex aliquem cogit ostendere causam, necesse est quod causa sit justa et letitima. Where the law compels a man to show cause, the cause ought to be just and legal. 2 Co. Inst. 269.

A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.