Concept

Cardinal virtues

Overview

set of four virtues recognized in the writings of Classical Antiquity: prudence, justice, fortitude, temperance

Overview adapted from Wikipedia (CC BY-SA 4.0; see the article history for authors).

Found by search and not yet checked by a person; they may only mention the idea in passing.

There are eleven Virtues named by the said Philosopher. The first is called Courage, which is sword and bridle to moderate our boldness and timidity in things which are the ruin of our life.
Dante Alighieri, The Banquet
States what Cardinal virtues is; the author is tied to Cardinal virtues in the knowledge graph.
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Moreover, Zeno admits (as Plato does) several virtues having various distinctions--to wit, prudence, fortitude, temperance, and justice--as being indeed inseparable, but yet divers and different from one another. But again, defining every one of them, he says that fortitude is prudence in executing, justice prudence in distributing, as being one and the same virtue, but seeming to differ in its relation to different…
Plutarch, Complete Works of Plutarch — Volume 3
States what Cardinal virtues is.
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It has then four divisions--prudence, justice, fortitude, and temperance. Prudence is the knowledge of things which are good, or bad, or neither good nor bad. Its parts are memory, intelligence, and foresight.
Marcus Tullius Cicero, The Orations of Marcus Tullius Cicero, Volume 4
Close in meaning to Cardinal virtues; the term itself is not named.
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Part of Stoicism.