Jeremiah 23:37-38

When someone asked a false prophet what message he had received from the Lord and the false prophet responded, "An oracle from Yahweh," he was lying. He should not claim to have an oracle from Yahweh when he did not have one. God commanded that this phrase should no longer be used because the false prophets had perverted His words (cf. Jeremiah 23:25-32).

". . . though the term ’oracle’ was used by canonical prophets (e.g., Isaiah 13:1; Nahum 1:1; Habakkuk 1:1; Zechariah 9:1; Malachi 1:1), Jeremiah never used it of his own prophecies because it had become the hallmark of the lying prophets." [Note: Feinberg, p. 526.]