He 'devoted' [='dedicated'] his life/time 'to' helping the poor. = He 'devoted himself to' helping the poor. [=he used his time, energy, etc., to help the poor]
The author's 'devoted' [='loyal, faithful'] readers have been eagerly waiting for the new book.
Some of the money they raise will be 'devoted to' repairing the church's roof.
(..) Come on! No one would use that sort of information against us. Now, wait a second! They would, wouldn't they? Oh no! There's probably a whole website devoted to us already! Oh I only posted it about an hour ago. Google our names! Oh no! What do we gotta do? I don't know! (..)2006 TvShow: The IT Crowd Title: Aunt Irma Visits Season: 1 Episode 6