Jeremiah 7:26
Yet they hearkened not unto me, nor inclined their ear, but hardened their neck: they did worse than their fathers.
Jeremiah 19:15
Thus saith the LORD of hosts, the God of Israel; Behold, I will bring upon this city and upon all her towns all the evil that I have pronounced against it, because they have hardened their necks, that they might not hear my words.