Malachi 2:1-2

New Catholic Bible

¹ And now, O priests,
    this commandment is for you.
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.