* a rod.
   The word {matteh} signifies a staff, or sceptre, which the
   prince or chief of each tribe bore, and which was the sign of
   office or royalty among almost all the people of the earth.

 * all their princes.
  1:5-16  2:3-30  10:14-27 
 * twelve rods.
  Ge 49:10  Ex 4:2,17  Ps 110:2  125:3  Eze 19:14  21:10,13 
  Eze 37:16-20  Mic 7:14