affirmation

(noun) a statement asserting the existence or the truth of something. Synonyms: avowal, avouchment.

(noun) the act of affirming or asserting or stating something. Synonyms: assertion, statement.

(noun) (religion) a solemn declaration that serves the same purpose as an oath (if an oath is objectionable to the person on religious or ethical grounds).

(noun) a judgment by a higher court that the judgment of a lower court was correct and should stand.