שמות ז:כט מדרש: Bamidbar Rabbah

… the prophets of Jerusalem were the first to sin, as it says “…for from the prophets of Jerusalem has falseness emanated to the whole land.” (Jeremiah 23:15) So too they were punished first and the rest did not escape, as it says “And a curse shall be taken from them…” (Jeremiah 29:22)