Charles Ellicott Commentary Jeremiah 35:17

"therefore thus saith Jehovah, the God of hosts, the God of Israel: Behold, I will bring upon Judah and upon all the inhabitants of Jerusalem all the evil that I have pronounced against them; because I have spoken unto them, but they have not heard; and I have called unto them, but they have not answered." — Jeremiah 35:17 (ASV)

Because I have spoken unto them, but they have not heard. —The prophet in part reproduces his own earlier complaint from Jeremiah 7:13; Jeremiah 25:7, a complaint which has been the ever-recurring burden of all teachers of wisdom (Proverbs 1:24) and of all true prophets (Isaiah 65:12; Isaiah 66:4).