@ Walking on water: Lightness Skill or Qinggong—where somebody is able to lighten their body weight to allow for swifter movements and do things like standing on water like a badass—is a common trope in wuxia stories. Any martial artist above grade trash would be able to do it and if you ever read manhua in the 90s/00s, practically every damn character can stand, walk, run and otherwise fight on water. These Korean manhwa seem to like reserving the skill to "strong characters" though.
TLDR: No it's not a reference to anything Biblical just a common trope.