at the

at the

hand/hands of
By or through the agency of: favors he received at the hands of his uncle.
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • put (one's) hands up
  • out of (one's) hands
  • out of hands
  • out of somebody's hands
  • out of your hands
  • have (one's) hands on (something)
  • join hands
  • a show of hands
  • show of hands