'Heavy' in the Bible

For this nation’s heart has grown hard,And with their ears they hardly hear,And they have [tightly] closed their eyes,Otherwise they would see with their eyes,And hear with their ears,And understand with their heart, and turn [to Me]And I would heal them [spiritually].’

“Teacher, which is the greatest commandment in the Law?”

The scribes and Pharisees tie up heavy loads [that are hard to bear] and place them on men’s shoulders, but they themselves will not lift a finger [to make them lighter].