Thematic Bible: Offer unworthy service to God

You put unclean bread on my altar. And you say, How have we made it unclean? By your saying, The table of the Lord is of no value. And when you give what is blind for an offering, it is no evil! and when you give what is damaged and ill, it is no evil! Give it now to your ruler; will he be pleased with you, or will you have his approval? says the Lord of armies. And now, make request for the grace of God so that he may have mercy on us: this has been your doing: will he give his approval to any of you? says the Lord of armies.