Isaiah 58:2-3

Yet they act so pious! They come to the Temple every day and seem delighted to learn all about me. They act like a righteous nation that would never abandon the laws of its God. They ask me to take action on their behalf, pretending they want to be near me. ‘We have fasted before you!’ they say. ‘Why aren’t you impressed? We have been very hard on ourselves, and you don’t even notice it!’