Rashi on Genesis
מי הגיד לך WHO TOLD THEE? — Whence has the knowledge come to you what shame there is in standing naked?
Rashbam on Genesis
המן העץ the prefix ה in the word המן introduces a question which keeps troubling the questioner. (Compare Arugat habossem, Auerbach edition page 36)
Sforno on Genesis
מי הגיד לך, who revealed to you the difference between good and evil?