“The best treasure a man can have is a sparing tongue.”
Source: Works and Days (c. 700 BC), line 719.
Original
Γλώσσης τοι θησαυρὸς ἐν ἀνθρώποισιν ἄριστος φειδωλῆς.
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Hesiod 61
Greek poetRelated quotes

As quoted in Peter's Quotations : Ideas for Our Time (1977) by Laurence J. Peter

Pages 25-26
2000s, (2008)

“All censure of a man's self is oblique praise. It is in order to shew how much he can spare.”
April 25, 1778, p. 403
Life of Samuel Johnson (1791), Vol III

“That man that hath a tongue, I say is no man, if with his tongue he cannot win a woman.”
Source: The Two Gentlemen of Verona

Musophilus (1599), Stanza 163, reported in Bartlett's Familiar Quotations, 10th ed. (1919). Compare: "Westward the course of empire takes its way", George Berkeley, On the Prospect of Planting Arts and Learning in America.