'Dull' in the Bible

Moses was 120 years old when he died, but his eye was not dull nor had his vitality departed.

For the heart of this people has become dull; they are hard of hearing, and they have shut their eyes, so that they would not see with their eyes and hear with their ears and understand with their hearts and turn, and I would heal them.'

For the heart of this people has become dull, and their ears are hard of hearing, and they have closed their eyes, so that they would not see with their eyes and hear with their ears and understand with their heart and turn, and I would heal them."'