* thirteen young bullocks.
  2,8  28:11,19,27  Ezr 3:4  Heb 10:12-14 
   At this feast thirteen bullocks, two rams, and fourteen lambs,
   were to be offered.  It is worthy of remark, that in each of
   the seven days of this feast one bullock is to be abated, so
   that on the seventh day (ver. 32) they were to offer seven
   bullocks, but the rams and lambs were every day alike; which
   appointment might signify a diminishing and wearing away of
   the legal offerings, to lead them to the spiritual and
   reasonable service, by presenting their own bodies a living
   sacrifice, holy, and acceptable unto God.

  Ro 12:1