[PW] Origin of quote

[Joy Tofteland]

I am trying to find the origin of the quote "You take the king's coin, you do the king's (business/bidding)"  I have not been able to verify it in Bartlett's or Yale Book of Quotations.  A Google search provides many variants of the quote and attributes it to a "common expression" or "an old saying".  Patron needs an accurate quote and origin.  Please help.

Joy Tofteland
Reference/Technical Resources Librarian
Kirkendall Public Library
Ankeny, IA