Translation
Woe to you who are now filled up, for you will be famished.
Woe to those who are laughing now, for you will wail and weep.
Paraphrase
Watch out because calamity will come to those of you who have had your tanks filled up and you are currently full to the top, because later you will yearn for food and not find any. Watch out because calamity will come to those of you who are laughing out loud right now because you will wail loudly for your deep loss and you will weep unconsolably.