Albert Barnes Commentary Jeremiah 19:7

"And I will make void the counsel of Judah and Jerusalem in this place; and I will cause them to fall by the sword before their enemies, and by the hand of them that seek their life: and their dead bodies will I give to be food for the birds of the heavens, and for the beasts of the earth." — Jeremiah 19:7 (ASV)

Make void - The verb used here is that from which “bottle” (Jeremiah 19:1) is derived, and as it represents the sound made by the water running out, it would be better translated, “pour out.” Jeremiah perhaps carried the bottle to Tophet full of water, the symbol in the East of life (Isaiah 35:6; Isaiah 41:18), and at these words emptied it before the assembled elders.