seek a knot in a bulrush

seek a knot in a bulrush

To engage in a futile task; to try to find problems where none exist. A bulrush is a grassy plant that is not prone to knots. You'd have better luck seeking a knot in a bulrush than getting those flowers to grow on such rocky soil. I read the report so many times that the boss will be seeking a knot in a bulrush to try to find errors in it.
See also: knot, seek
Farlex Dictionary of Idioms.
See also:
  • give somebody/something up for lost
  • give someone up for lost
  • give up for lost
  • give (someone or something) up for lost
  • give somebody/something up as a bad job
  • give (one) up as a bad job
  • ocean
  • milk the ram
  • milk the bull
  • quit