Is it permissible for a person praying to smile if he passes by a verse that makes him smile?

Question : May Allah preserve you. We said that if a person passes by a verse that causes him sadness, he may be sad, and if he passes by a verse that causes him joy, he may be joyful. For example, if he passes by a verse and smiles, he may smile.

Answer : He also prohibited loud laughter. I say: if he hears something that causes laughter, is it permissible for him to laugh? Yes, smiling. The scholars said there is no harm in it during prayer because no sound is emitted from it, and there is no harm in it. As for loud laughter, it is not permissible because it invalidates the prayer.