“Dast-e shomā dard nakonad” is a polite Persian expression used to thank someone for their effort or hard work. It literally means “May your hand not hurt,” but it is actually a way of saying “Thank you for your effort.” A: I made this cake for you. B: دست شما درد نکند! خیلی خوشمزه است. A: I made this cake for you. B: Thank you so much! It’s delicious