When a man boasted in his presence that he was a native of an illustrious city, he said, “That is not what one ought to look at, but whether one is worthy of a great city.”

[πρὸς τὸν καυχώμενον ὡς ἀπὸ μεγάλης πόλεως εἴη, “οὐ τοῦτο,” ἔφη, “δεῖ σκοπεῖν, ἀλλ᾽ ὅστις μεγάλης πατρίδος ἄξιός ἐστιν.”]

Aristotle (384-322 BC) Greek philosopher

Attributed in Diogenes Laërtius, Lives and Opinions of Eminent Philosophers [Vitae Philosophorum], Book 5, sec. 11 [tr. Yonge (1853)]
    (Source)

(Source (Greek)). Alternate translations:

To one who boasted that he belonged to a great city his reply was, "That is not the point to consider, but who it is that is worthy of a great country."
[tr. Hicks (1925), sec. 19]

To a man boasting that he was from a great city, he said “Don’t look at this, but instead who is worthy of a great country.”
[tr. @sentantiq (2016)]

To someone who boasted that he came from a great city, he said, "That is not what one should consider, but who it is that is worthy of a great country."
[tr. Mensch (2018)]