How is “so help me” used?

In How the West Was Won (1962), one line is: “...and so help me, the bucket was full of rocks.”

Which movie is “so help me” from?

The clip at the top of this page is from How the West Was Won (1962).

used to swear that what you are saying is true, especially in a court of law

Se oye en 20 películas

Oxford100% de las películas
used to swear that what you are saying is true, especially in a court of law
So help me God.
It sounds crazy, Keyes, but it's true, so help me.

Definiciones del Oxford Advanced Learner's Dictionary, 9.ª edición

...and so help me, the bucket was full of rocks.

En 8 películas · n.º 1