Obsessive–compulsive disorder
Many people mistakenly think OCD is only about organizing or cleaning, but it is more than just those two. For example, someone who has excessive fear of disappointing God, fear they will go to Hell upon death, or committing sins is scrupulous, which is OCD based on religion. Compulsions of someone who is scrupulous includes excessive praying, excessive trips to their church, asking their priest the same question if what they did is a sin even though they've been told it's not, etc.