false oath

Countess Ellenburg looked eager and grim; her lips could not swear a false oath—well, she was not asked to swear any oath now.

In short, I turn'd him away apon't, for he is no servant for me that's taken in a false Oath.

A false oath is supposed to bring awful retribution upon its maker and upon his posterity.

They were religiously to be freed in expiation of a false oath taken in mistake—(Sura V, 91).

They have taken a false oath to secure seats which they cannot occupy as gentlemen, patriots, loyal citizens or Assemblymen.