rededicate oneself or to

rededicate (oneself) to (something)

To reassert or reaffirm one's dedication or commitment to something or some activity. That near-death experience really prompted me to rededicate myself to my faith. I'm really trying to rededicate myself to my career, because I've been feeling like I'm in a rut lately.
See also: rededicate
Farlex Dictionary of Idioms.

rededicate oneself or something to someone or something

to reaffirm the dedication of oneself or something to someone or something. I must ask you to rededicate yourself to our high purposes. They rededicated their church to God.
See also: rededicate
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • rededicate
  • rededicate (oneself) to (something)
  • if it's the last thing I do
  • be remembered as (something)
  • be remembered as/for something
  • at (one's) doorstep
  • at doorstep
  • at expense
  • at someone's expense
  • at (one's) expense