Is money earned from working in a restaurant that sells alcohol unlawful? Is it permissible to carry alcohol one time for the purpose of delivering it to another person, and does that fall under the Hadith of the curse?

It is not permissible to work in a restaurant that sells alcoholic beverages or other forbidden items, as this falls under cooperating in sin and condoning evil. The worker must repent. What he earned from this work falls under the ruling of mixed wealth, so he must estimate the proportion of the unlawful earnings and donate it as charity. Carrying alcohol, even a small amount, places its bearer under the scope of the curse mentioned in the noble Hadeeth. The criterion for work is its compliance with Allah's law and seeking His pleasure, not merely the effort and toil involved.