dictum

maxim, aphorism; apothegm, apophthegm; dictum, saying, adage, saw, proverb; sentence, mot, motto, word, byword, moral, phylactery, protasis., axiom, theorem, scholium, truism, postulate., reflection (idea); conclusion (judgment); golden rule (precept); principle, principia; profession of faith (belief); settled principle, formula., wise maxim, sage maxim, received maxim, admitted maxim, recognized maxim; true saying, common saying, hackneyed saying, trite saying, commonplace saying.

aphoristic, proverbial, phylacteric; axiomatic, gnomic.

as the saying is, as they say.