Rachel took Lavan's terafim and hid them. Yaakov pronounced what some commentators view as a curse on anyone who had them (not just the one with whom they were found, but even if they were not found as the Riva comments on Rashi).
עם אשר תמצא את אלהיך וגו' פרש"י ומאותה קללה מתה רחל בדרך. וק' שהרי לא מצא לבן את התרפים וא"כ מנ"ל שנענשה רחל מאותה קללה וי"ל משום דאמרינן קללת חכם אפי' לחנם היא באה:
This curse led to Rachel's death (according to this understanding). But did anyone ever find out that Rachel had the idols or make the connection between the curse and her death? Did Yaakov ever learn that it was his words which condemned her to a death sentence? (could he have undone his curse if he knew?)