Isaiah 58:3

‘Why have we fasted,’ they say, ‘and You do not see it? Why have we humbled ourselves and You do not notice?’ Hear this [O Israel], on the day of your fast [when you should be grieving for your sins] you find something you desire [to do], And you force your hired servants to work [instead of stopping all work, as the law teaches]. [Lev 16:29]