What specific quote is associated with the ancient Greek philosopher Plato regarding necessity?

Necessity introduces a new thing into the world.

The philosophical tradition recognizing the link between need and creation extends back to classical antiquity, well before the modern English phrasing was standardized. The concept is specifically linked to the Greek philosopher Plato, who is reported to have articulated the idea that necessity serves as the mechanism through which novel elements or things are brought into existence. This ancient suggestion provides the foundational philosophical backing for the later, more formalized proverb, establishing the core recognition that a lack or requirement is what compels the arrival of something entirely new into the practical world.