le avevo detto di

I had told her to

→ le
phrase Rare #32,508
I had told her to Le means “to her” here, and avevo detto is the pluperfect of dire (“had told”). It is followed by an infinitive. Depending on context, le can also mean “to them” or be the formal “to you.”
IT: Le avevo detto di aspettarmi fuori.
EN: I had told her to wait for me outside.

Le avevo detto di non partorire.

I had told her not to give birth.

— Le buone stelle - Broker (2022)

Le avevo detto di cenare con noi!

I told her to have dinner with us!

— In the mood for love (2000)

Le avevo detto di non disturbarmi.

I told her not to disturb me.

— Il quinto elemento (1997)

Ho detto che le avevo detto di non partorire!

I said that I had told her not to give birth!

— Le buone stelle - Broker (2022)

Le avevo detto di aspettarmi all'ingresso!

I had told her to wait for me at the entrance!

— Stalker (1979)

Le avevo detto di restare in macchina.

I told her to stay in the car.

Le avevo detto di girarci attorno!

I told her to go around it!

— Indiana Jones e l'ultima crociata (1989)