The phrase "a devout follower" is correct and usable in written English.
It can be used to describe someone who is deeply committed or loyal to a particular belief, religion, or leader.
Example: "She is a devout follower of the teachings of her spiritual leader, attending every service without fail."
Alternatives: "a devoted adherent" or "a loyal disciple."
Tóibín sees Mary Magdalene as a devout follower of Jesus, a faithful friend to his mother.
He stopped drinking and smoking and became a devout follower of Graham.
So are you a Don Cossack fan or a devout follower of Cue Card?
A player shouldn't have to make a pilgrimage, or be a devout follower of any specific faith, to be able to briefly celebrate however he feels like it.
He had said that his daughter was a "devout follower," and that the Taliban trained students at the school in "fighting Americans".
A devout follower of man-to-man defense, it was a bit odd that West Virginia got there behind the outstretched arms of its 1-3-1 zone.
Fried cheese may be a cult of my own making, but I'm a happily devout follower.
For a man accused of betraying his country to the godless leadership of the Soviet Communist Party, Robert Philip Hanssen could not have seemed a more devout follower of the Roman Catholic Church -- or a more committed anti-Communist.
In the New Testament she is described simply as an early and devout follower of Jesus, but over the centuries this popular saint has been tagged with many other personas: a prostitute, courtesan and femme fatale; a penitent, muse, teacher and preacher; a well-groomed fashion plate and a wasted hag in rags.
Still, in the eyes of many US Latinos, Pope Francis (or "Panchito" as one devout follower lovingly calls him) is the real deal, and is having a decided effect.
The devout follower of Shintō, for example, rinses hands and mouth with water before approaching a shrine.
