Torah Revealed From Heaven

In the introduction to his commentary on Maseches Eduyos, the Raavad writes that his chiddushim are not from any Rav or teacher but come from the help of the Teacher who teaches man knowledge, Hashem, as the pasuk says that the secret of Hashem is given to those who fear Him. He often cites that pasuk, and a well-known saying of the Geonim that so it has been revealed to him from Heaven.