פירוש על ירמיהו 45:5

And you seek great things for yourself? [“Great things” means] prophecies. Cf. “Please tell me all the great things etc.” (II Kings 8:4). “Call to me...and I will tell you great, etc,” (above 33:3). The Holy One, blessed be He, said to him: If there is no vineyard, there is no fence, and if there are no sheep, there is no shepherd. I reveal Myself to the prophets only in the merit of Israel. We learned this in the Mechilta, in the beginning.