Women just can’t be trusted any more.

[Ἐπεὶ οὐκέτι πιστὰ γυναιξίν.]

Homer (fl. 7th-8th C. BC) Greek author

The Odyssey [Ὀδύσσεια], Book 11, l. 456 (11.456) [Agamemnon] (c. 700 BC) [tr. Lombardo (2000), l. 274]
    (Source)

The spirit of Agamemnon, who had been slain on his homecoming by Clytemnestra, is giving Odysseus marital advice when they meet in Hades. Agamemnon doesn't mention he had sacrificed their daughter, Iphigenia, to raise up good winds before setting sail for Troy.

(Source (Greek)). Other translations:

For ’tis no world to trust a woman now.
[tr. Chapman (1616)]

Remember still, Women unfaithful are.
[tr. Hobbes (1675)]

For since of womankind so few are just,
Think all are false, nor even the faithful trust.
[tr. Pope (1725)]

For woman merits trust no more.
[tr. Cowper (1792), l. 453]

No more are women to be trusted now.
[tr. Worsley (1861), st. 54]

For that trust
Henceforth in women must never be plac'd.
[tr. Musgrave (1869), l. 706ff]

No trust in women!
[tr. Bigge-Wither (1869), l. 455]

For there is no more faith in woman.
[tr. Butcher/Lang (1879) and Palmer (1891)]

From now henceforth in women no troth or trust shall be.
[tr. Morris (1887)]

For after all this there is no trusting women.
[tr. Butler (1898)]

For no longer is there faith in women.
[tr. Murray (1919)]

There is no putting faith in women.
[tr. Lawrence (1932)]

Women, I tell you, are no longer to be trusted.
[tr. Rieu (1946) and DCH Rieu (2002)]

The day of faithful wives is gone forever.
[tr. Fitzgerald (1961)]

There is no trusting in women.
[tr. Lattimore (1965)]

No woman merits trust.
[tr. Mandelbaum (1990)]

The time for trusting women's gone forever! [
tr. Fagles (1996), l. 456]

Women can no longer be trusted.
[tr. Kline (2004)]

Women are no longer to be trusted.
[tr. Verity (2016)]

There is no trusting women any longer.
[tr. Wilson (2018)]

No more is there faith in women.
[tr. Green (2018)]

For there’s no trust
in women anymore.
[tr. Johnston (2019), l. 577ff]