John Calvin on Jeremiah 44:5

And he adds, But they hearkened not, nor inclined their ear to turn from their wickedness, to burn no incense to alien gods Here God charges the Jews with irreclaimable obstinacy, for the teaching of the Law did not retain them in obedience, nor did they attend to it, though often and at different times warned and admonished by the Prophets. And their perverseness he still more clearly sets forth by the second clause, when he says that they did not incline their ear Had he said, “They have not hearkened,” it would have been quite sufficient; but when he adds, “They have not inclined their ear,” he expresses, as I have said, something worse than contempt, even that they designedly rejected the teaching of the Prophets, that they disdained to hear the Prophets or to listen to their admonitions, but became willingly deaf, nay, closed up their ears, as rebels do, who are said elsewhere to harden their heart. We now then understand the import of this verse.