The Collaborative International Dictionary of English v.0.48:

Wherewithal \Where`with*al"\, adv. & n.
   Wherewith. "Wherewithal shall we be clothed?" --Matt. vi. 31.
   [1913 Webster]

         Wherewithal shall a young man cleanse his way? --Ps.
                                                  cxix. 9.
   [1913 Webster]

         [The builders of Babel], still with vain design,
         New Babels, had they wherewithal, would build.
                                                  --Milton.
   [1913 Webster]

WordNet (r) 3.0 (2006):

wherewithal
    n 1: the necessary means (especially financial means)