The Jargon File (version 4.4.7, 29 Dec 2003):

Knuth
 /ka?nooth'/, n.

    [Donald E. Knuth's The Art of Computer Programming] Mythically, the
    reference that answers all questions about data structures or algorithms. A
    safe answer when you do not know: ?I think you can find that in Knuth.?
    Contrast the literature. See also bible. There is a Donald Knuth home
    page at http://Sunburn.Stanford.EDU/~knuth/.


The Free On-line Dictionary of Computing (30 December 2018):

Knuth

   /knooth/ 1. Donald Knuth.

   2. ["The Art of Computer Programming", Donald E. Knuth]
   Mythically, the reference that answers all questions about
   data structures or algorithms.  A safe answer when you do not
   know: "I think you can find that in Knuth."

   Contrast literature.  See also bible.

   [Jargon File]