Source : Webster's Revised Unabridged Dictionary (1913)

Oversow \O`ver*sow"\, v. t. [AS. ofersawan.]
   To sow where something has already been sown. [R.]

         His enemy came and oversowed cockle among the wheat.
                                                  --Matt. x?ii.
                                                  25. (Douay
                                                  Version).