* Two.
   The [mulon [] was a hand-mill composed
   of two stones; "the uppermost of which is turned round by a
   small handle of wood or iron that is placed in the rim.  When
   this stone is large, or expedition required, a second person
   is called to assist; and as it is usual for women alone to be
   concerned in this employment, who seat themselves over against
   each other with the millstone between then, we may see not
   only the propriety of the expression, Ex 11:5," but the force
   of this.--Dr. Shaw.

 * grinding.
  Ex 11:5  Isa 47:2