The Collaborative International Dictionary of English v.0.48:

Tithe \Tithe\, v. t. [imp. & p. p. Tithed; p. pr. & vb. n.
   Tithing.] [As. te['o]?ian.]
   To levy a tenth part on; to tax to the amount of a tenth; to
   pay tithes on.
   [1913 Webster]

         Ye tithe mint and rue.                   --Luke xi. 42.
   [1913 Webster]