The rest of the text might be parody of Taoist texts, but the opening is a Kung Fu (1972) reference:

   When you can snatch the pebble from my hand, it will be time for you to leave.

https://tvtropes.org/pmwiki/pmwiki.php/Main/WhenYouSnatchThe...

I don't think the Tao Te Ching or Zhuangzi has the pebble quote.