Isaiah 1:12-17 (ESV):
12 “When you come to appear before me, who has required of you this trampling of my courts?
13 Bring no more vain offerings; incense is an abomination to me. New moon and Sabbath and the calling of convocations— I cannot endure iniquity and solemn assembly.
14 Your new moons and your appointed feasts my soul hates; they have become a burden to me; I am weary of bearing them.
15 When you spread out your hands, I will hide my eyes from you; even though you make many prayers, I will not listen; your hands are full of blood.
16 Wash yourselves; make yourselves clean; remove the evil of your deeds from before my eyes; cease to do evil,
17 learn to do good; seek justice, correct oppression; bring justice to the fatherless, plead the widow's cause.
God looks fed up with the celebration of the new moons, the Sabbaths, the calling of convocations and solemn assemblies in general. Instead, He rather wants the Israelites to learn to do good; seek justice, correct oppression; bring justice to the fatherless, plead the widow's cause (v17).
Is God assigning equal importance to the new moons, the Sabbaths and the holy convocations, and presenting them as less important than what really matters, namely, doing good and seeking justice?