17. thou he of whom I have spoken in old time—Gog, &c. are here identified with the enemies spoken of in other prophecies (Nu 24:17-24; Isa 27:1; compare Isa 26:20, 21; Jer 30:23, 24; Joe 3:1; Mic 5:5, 6; Isa 14:12-14; 59:19). God is represented as addressing Gog at the time of his assault; therefore, the "old time" is the time long prior, when Ezekiel uttered these prophecies; so, he also, as well as Daniel (Da 11:1-45) and Zechariah (Zec 14:1-21) are included among "the prophets of Israel" here.
many years—ago.