Read James 5:5 Using Other Translations
Ye have lived in pleasure on the earth, and been wanton; ye have nourished your hearts, as in a day of slaughter.
You have lived on the earth in luxury and in self-indulgence. You have fattened your hearts in a day of slaughter.
You have spent your years on earth in luxury, satisfying your every desire. You have fattened yourselves for the day of slaughter.