Acts 28:26-27 NIV

26 " 'Go to this people and say, "You will be ever hearing but never understanding; you will be ever seeing but never perceiving."
27 For this people's heart has become calloused;1 they hardly hear with their ears, and they have closed their eyes. Otherwise they might see with their eyes, hear with their ears, understand with their hearts and turn, and I would heal them.'a2

References for Acts 28:27