Meaning of the word "so help me (God)" in English

What does "so help me (God)" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

so help me (God)

US /soʊ hɛlp mi (ɡɑd)/
UK /səʊ hɛlp mi (ɡɒd)/
"so help me (God)" picture

Idiom

used to emphasize that one is telling the truth or making a very serious promise or threat

Example:
I swear I didn't do it, so help me God!
I'll get to the bottom of this, so help me.