Oath

A solemn affirmation or declaration, made with a reverent appeal to God for the truth of what is affirmed.

A solemn affirmation, connected with a sacred object, or one regarded as sacred, as the temple, the altar, the blood of Abel, the Bible, the Koran, etc.

An appeal (in verification of a statement made) to a superior sanction, in such a form as exposes the party making the appeal to an indictment for perjury if the statement be false.

A careless and blasphemous use of the name of the divine Being, or anything divine or sacred, by way of appeal or as a profane exclamation or ejaculation; an expression of profane swearing.

a solemn promise, usually invoking a divine witness, regarding your future acts or behavior; "they took an oath of allegiance"