The Messenger of Allah صلى الله عليه وسلم said: “Whoever reads a letter from the Book of Allah, he will have a reward. And that reward will be multiplied by ten. I am not saying that “Alif, Laam, Meem” is a letter, rather I am saying that “Alif” is a letter, “laam” is a letter and “meem” is a letter.”

Reported by at-Tirmidhi on the authority of ‘Abd Allah b. Mas’ud and it is a sound hadith.