Malachi 2:1-3

‘And now, you priests, this warning is for you. If you do not listen, and if you do not resolve to honour my name,’ says the LORD Almighty, ‘I will send a curse on you, and I will curse your blessings. Yes, I have already cursed them, because you have not resolved to honour me. ‘Because of you I will rebuke your descendants; I will smear on your faces the dung from your festival sacrifices, and you will be carried off with it.