"For … they hearken to the me'onenim and the diviners": lest you say, they have whom to consult, and we do not; "but you, not thus (to hearken to them) did the L-rd your G-d relegate you." It (the means of consultation) was given to you (i.e., by means of a prophet, etc.); but you forsake words of Torah and occupy yourself with these!
(Devarim 18:15) "A prophet from your midst, from your brothers, such as I, the L-rd your G-d will establish for you": "from your midst" — not from outside Eretz Yisrael; "from your brothers" — not from others (i.e., gentiles). "will establish for you" — and not for idolators. How, then, am I to understand (Jeremiah 1:5) "A prophet for the nations have I made you (Jeremiah)"? For those (Jews) who deport themselves as the nations do.