The phrase "a dictum of" is correct and usable in written English.
It can be used when referring to a formal statement or authoritative pronouncement, often in legal or philosophical contexts.
Example: "The judge's ruling was based on a dictum of the Supreme Court that established a precedent for similar cases."
Alternatives: "a statement from" or "a pronouncement of".
That's as clear and convincing a dictum for an essential part of the novelist's art as anything in Flaubert.
I recalled a favorite dictum of his: man can be destroyed, but not defeated.
To paraphrase a favorite dictum of Edward I. Koch, there is nothing more rewarding than public service done well and honestly.
Mamet is fortified in his truculence by the lesson of his poker playing ("If you're smarter than the other guy, be smarter than the other guy") and by a favorite dictum of the English critic William Hazlitt, which he paraphrases as "Don't try to suck up or even be nice to your intellectual inferiors.
Taken together, the repression and warnings of radicalization may underline an emerging dictum of the Arab uprisings: violence begets violence.
Before we have more confidence that we can do good for people suffering from Parkinson's disease and other degenerative conditions, we must rely on an ancient dictum of the physician: First, do no harm.
What does it say about a nation's capacity to sustain its plural identity when its liberal voices accept – even welcome – the entrenchment of a dictum which, ignoring every principle of natural justice, punishes the injured minority to placate the majority?
For instance, like al-Ghazālī, Autrecourt in one formulation of his criticism of necessary connections relies on a dictum that the existence of one thing cannot be logically inferred from the existence of another thing (Weinburg 1964, 272).
In order to survive as an organism the dictum of "no cell is an island" holds true.
