You'll never see it again. It's gone forever. Literal translation: You'll see it like (you see) your ears. SOURCE: Bernstein, Jüdische Sprichwörter und Redensarten.
דו וועסט עס שוין זען ווי דײַנע אויערן.
Du vest es shoyn zen vi dayne oyern.
You'll see it when you see your own ears.