'Work' in the Bible

Then the king gave a great feast for all his captains and his servants, even Esther's feast; and he gave orders through all the divisions of his kingdom for a day of rest from work, and gave wealth from his store.

If the king approves, let it be decreed that they're to be destroyed, and I'll measure out 10,000 silver talents and bring it to the king's treasury for those who will do the work."

All the provincial officials, the regional authorities, the governors, and those doing the king's work supported the Jewish people because the fear of Mordecai had come over them.

and all the work of his strength, and his might, and the explanation of the greatness of Mordecai with which the king made him great, are they not written on the book of the Chronicles of Media and Persia?