me l'avait dit

had told me

→ me
phrase Rare #36,851
had told me Used to say that someone had previously told the speaker something. The pronoun “l’” means “it,” “him,” or “her,” depending on context.
FR: Mon frère me l'avait dit, mais je ne l'ai pas écouté.
EN: My brother had told me, but I didn't listen to him.

Mon père me l'avait dit.

My father had told me so.

— Le Château dans le ciel (1986)

Ton dealer aussi me l'avait dit.

Your dealer had told me that too.

— Les Invasions barbares (2003)

Je ne me rappelle pas qui exactement me l'avait dit.

I don't remember exactly who told me.

J'ai pensé à toutes les fois où il me l'avait dit.

I thought about all the times he had told me that.

— Femmes au bord de la crise de nerfs (1988)

Il me l'avait dit.

He told me.

Elle me l'avait dit.

She told me.

Maman me l'avait dit.

Mom had told me so.

— Arrietty, le petit monde des chapardeurs (2010)