The Collaborative International Dictionary of English v.0.48:

Sopite \So"pite\, v. t. [L. sopitus, p. p. of sopire to put to
   sleep; akin to sopor a sleeping draught, a heavy sleep.]
   To lay asleep; to put to sleep; to quiet. [Obs.]
   [1913 Webster]

         The king's declaration for the sopiting of all Arminian
         heresies.                                --Fuller.
   [1913 Webster]