Ben Bernanke actually said...
If no action is taken on January 1, 2013, between expiration of tax cuts, sequestration, and a number of other measures, there will be a very sharp change in the fiscal stance of the Federal Government, which by itself with no compensating action would indeed slow the recovery.
Context
Bernanke warns of economic slowdown without action on tax cuts and sequestration.
02/13/2012