Reward of reading a letter from Holy Quran ...

➨ QURAN 99:6
That Day (day of judgement) , the people will depart separated [into categories] to be shown [the result of] their deeds.
➨ QURAN 99:7
So whoever does an atom's weight of good will see it,

► PROPHET MUHAMMAD (saws) said:
Whoever recites a letter from Allah's Book, then he receives the reward from it, and the reward of ten the like of... it. I do not say that Alif Lam Mim is a letter, but Alif is a letter, Lam is a letter and Mim is a letter.

(SUNAN TIRMIDHI Vol #5, Hadith #2910)

► PROPHET MUHAMMAD (saws) said:
If any one of you improve (follows strictly) his Islamic religion then his good deeds will be rewarded ten times to seven hundred times for each good deed and a bad deed will be recorded as it is.

(SAHIH BUKHARI Vol #1, Hadith #42)
(SAHIH MUSLIM Vol #1, Hadith #336)

► PROPHET MUHAMMAD (saws) said
ALLAH (swt) said:
If My slave thinks of doing a good deed and does not do it, I will write it down as one good deed. If he does it, I will write it down for him between ten and seven-hundred fold.

(SAHIH MUSLIM Vol #1, Hadith #334-339)

► PROPHET MUHAMMAD (saws) said:
Such a person as recites the Qur'an and masters it by heart, will be with the noble righteous scribes (in Heaven). And such a person exerts himself to learn the Qur'an by heart, and recites it with great difficulty, will have a double reward.

(SAHIH BUKHARI Vol #6, Hadith #4987)