Gregory the Dialogist

He will open also their ear, to correct them, and will speak to them that they return from iniquity. To 'open the ear from iniquity,' is to lay open the understanding of knowledge. But a man is reproved, and his ear opened, when he feels within him a desire after eternal goods, and acknowledges the sins which he has outwardly committed. But temporal punishment can also be understood by the chains and cords of poverty. …

Morals on the Book of Job, Book XXVI ↗

Thomas Aquinas

Not only does he force them to recognize their past sins, but he also shows them that they are punished for these sins, and so he says, "He will also open their ears," that is, he will make them understand that God speaks to them in punishing them. Therefore they are punished because of their sins, and so he says, "to correct them," as if to say: He will make them recognize that God punished them to correct them. …

Commentary on Job ↗