No trust is safe.

[Nusquam tuta fides.]

Virgil (70-19 BC) Roman poet [b. Publius Vergilius Maro; also Vergil]

The Aeneid [Ænē̆is], Book 4, l. 373 (4.373) [Dido] (29-19 BC) [tr. Bartsch (2021)]
    (Source)

Dido chiding Aeneas (and the gods) for Aeneas' desertion.

(Source (Latin)). Alternate translations:

True faith is lost.
[tr. Ogilby (1649)]

Faithless is earth, and faithless are the skies!
Justice is fled, and Truth is now no more!
[tr. Dryden (1697)]

Firm faith no where subsists.
[tr. Davidson/Buckley (1854)]

No faith on earth, in heaven no trust.
[tr. Conington (1866)]

Faith lives no more.
[tr. Cranch (1872)]

Nowhere is trust safe.
[tr. Mackail (1885)]

All faith is gone!
[tr. Morris (1900)]

Faithless is earth, and false is Heaven above.
[tr. Taylor (1907), st. 48, l. 426]

No trusting heart is safe
in all this world.
[tr. Williams (1910)]

Nowhere is faith secure.
[tr. Fairclough (1916)]

Faith has no haven anywhere in the world.
[tr. Humphries (1951)]

Nowhere is it safe to be trustful.
[tr. Day Lewis (1952)]

Nowhere is certain trust.
[tr. Mandelbaum (1971), l. 509]

Faith can never be secure.
[tr. Fitzgerald (1981), l. 514]

Is there nothing we can trust in this life?
[tr. West (1990)]

Nowhere is truth safe.
[tr. Kline (2002)]

Good faith is found nowhere.
[tr. Lombardo (2005)]

There’s no faith left on earth!
[tr. Fagles (2006)]