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.
(..) He worships you. He is in love with you, I think. So I should kill him? A ruler who kills those devoted to her is not a ruler who inspires devotion. And you're going to need to inspire devotion, a lot of it, if you're ever going to rule (..)2015 TvShow: Game of Thrones Title: Hardhome Season: 5 Episode 8
(..) Whomever Ser Jorah was when he started informing on you, he is no longer that man. I can't remember ever seeing a sane man as devoted to anything as he is to serving you. And yet he did betray you. Did he have an opportunity to confess his betrayal? (..)2015 TvShow: Game of Thrones Title: Hardhome Season: 5 Episode 8