Source

Lives of Eminent Philosophers

probably first half of the 3rd century CEGreek philosophyClassical (200 BCE – 600 CE)Diogenes LaertiusBook

Ten books of biographies and sayings of Greek philosophers, from the earliest sages to Epicurus. Book VII covers Zeno of Citium and the Stoics; for many thinkers it is our main surviving source.

References

https://en.wikipedia.org/wiki/Diogenes_La%C3%ABrtius

Quotes (1)

“This is the reason why we have two ears and only one mouth, that we may hear more and speak less.”
— Zeno of Citium, As reported by Diogenes Laertius, Lives of Eminent Philosophers VII (Life of Zeno), tr. C. D. Yonge
VerifiedsourceMaxim: Listen more than you speak.Translation: public-domain translation (C. D. Yonge)