Who said "Rust eats iron. Envy eats the envious."?

Antisthenes (c. 446–366 BC). Source: Diogenes Laertius 6.5.

What is the original Greek?

ὥσπερ ὑπὸ τοῦ ἰοῦ τὸν σίδηρον, οὕτως ἔλεγε τοὺς φθονεροὺς ὑπὸ τοῦ ἰδίου ἤθους κατεσθίεσθαι. Translated from the original Greek by Spartan Surfers.

Antisthenes, Diogenes Laertius 6.5

"Rust eats iron. Envy eats the envious." Antisthenes said it in Diogenes Laertius 6.5. Translated from the original Greek by Spartan Surfers.

"ὥσπερ ὑπὸ τοῦ ἰοῦ τὸν σίδηρον, οὕτως ἔλεγε τοὺς φθονεροὺς ὑπὸ τοῦ ἰδίου ἤθους κατεσθίεσθαι."

Original Greek, Diogenes Laertius 6.5. Greek: Hicks 1925 Loeb text via Perseus.

Antisthenes (c. 446–366 BC). Student of Socrates and forerunner of the Cynics.

Who said "Rust eats iron. Envy eats the envious."?: Antisthenes (c. 446–366 BC). Source: Diogenes Laertius 6.5.
What is the original Greek?: ὥσπερ ὑπὸ τοῦ ἰοῦ τὸν σίδηρον, οὕτως ἔλεγε τοὺς φθονεροὺς ὑπὸ τοῦ ἰδίου ἤθους κατεσθίεσθαι. Translated from the original Greek by Spartan Surfers.