This was a princely present.  The "thirty milch camels" were
   particularly valuable; for among the Arabs they constitute a
   principal part of their riches; being every way so
   serviceable, that the providence of God appears peculiarly
   kind and wise in providing such animals for those countries,
   where no other animal could be of equal service.  The
   she-camel gives milk continually, not ceasing even when with
   young; the milk of which, when mixed with three parts of
   water, affords the most pleasant and wholesome beverage.

  30:43  31:9,16  De 8:18  1Sa 25:2  Job 1:3  42:12