de source sûre

from a reliable source

→ de
phrase Rare #43,283
from a reliable source Used for information you trust because it comes from someone or somewhere dependable.
FR: J’ai entendu cette nouvelle de source sûre.
EN: I heard this news from a reliable source.

Je le sais de source sûre.

I know this from a reliable source.

Je le tiens de source sûre.

I heard it from a reliable source.

On tient de source sûre que tu sais.

We have it on good authority that you know.

Je tiens ce renseignement de source sûre.

I have this information from a reliable source.