“I hate, I despise your feast days, And I do not savor your sacred assemblies. Though you offer Me burnt offerings and your grain offerings, I will not accept them, Nor will I regard your fattened peace offerings. Take away from Me the noise of your songs, For I will not hear the melody of your stringed instruments. But let justice run down like water, And righteousness like a mighty stream.” (Amos 5:21-24)
God hates empty, hypocritical worship.