Malachi 2:2-4

New Catholic Bible

² If you refuse to listen to me
    and do not sincerely resolve
to give glory to my name,
    says the Lord of hosts,
I will send a curse on you,
    and I will turn your blessings into a curse.
Indeed, I have already done so
    because you have not heeded my warning.
³ I will deprive you of the shoulder
    and spread dung on your faces,
the dung of your offerings,
    and I will banish you from my presence.
⁴ Then you will know
    that I sent you this commandment
because I wish to maintain
    my covenant with Levi,
    says the Lord of hosts.