The Prophet Mohammed said: “Whoever reads a letter from the Book of Allah, he will have a reward, and this reward will be multiplied by ten. I am not saying that ‘Alif, Lam, Meem’
(a combination of letters frequently mentioned in the Holy Quran) is a letter, rather I am saying that ‘Alif’ is a letter, ‘Lam’ is a letter and ‘Meem’ is a letter.” [At-Tirmithi] So increase your recitation of the Quran to gain these merits.
Also The Prophet Mohammed said:
“Indeed the one who recites the Quran beautifully, smoothly, and precisely, will be in the company of the noble and obedient angels. As for the one who recites with difficulty, stammering or stumbling through its verses, then he will have twice that reward.”
[Al-Bukhari and Muslim].