Mekhilta DeRabbi Yishmael
R. Shimon b. Azzai said: I do not come to detract from my master's words, but to add to them, viz.: Not to Moses alone did He speak in the merit of Israel, but to all of the prophets, viz. (Ezekiel 3:15) "And I sat there seven days, mute (i.e., without prophecy) among them," (Ibid. 16-17) "And it was at the end of seven days (of being among them) that the word of the L–rd (i.e., prophecy) came to me, saying." (Likewise, after the people had asked for Divine guidance), (Jeremiah 42:7) "And the word of the L–rd came to Jeremiah, etc."