'Dull of Hearing' in the Bible

For this peoples heart hath become gross, and their ears are dull of hearing, and their eyes they have closed, lest they should see with their eyes, and hear with their ears, and understand with their heart, and turn from their ways, and I should heal them."

For the heart of this people hath become gross, and their ears are dull of hearing, and their eyes they have closed; lest they should see with their eyes and hear with their ears, and understand with their heart and turn from their ways, and I should heal them."

Of whom we have much to say, and hard to be explained, seeing ye have become dull of hearing.