Hadhrat 'Ataa' bin Abi Ribaah, (Radhiyallahu anhu) says that Rasulullah (Sallallahu Alayhi Wasallam) is reported to have said, "Whoever reads surah Yaaseen in the'beginning of the day, all his needs for that day are fulfilled."
Many merits of surah Yaaseen are mentioned in ahadith. It is said in one hadith, "Everything has a heart, and the heart of the Glorious Qur'an is surah Yaaseen. Whoever reeds surah. Yaaseen, Almighty Allah records for him a reward equal to that of reading' the whole Qur'an ten times."
According to another Hadith Almighty Allah recited surah Yaaseen and surah Taahaa one thousand years before the creation of Heaven and Earth, and on hearing this the angels said, "Blessing' is for the ummat unto whom the Qur'an will be sent down, blessing is for the hearts that will bear, ie. memorize it, and blessing is for the tongues that will recite it."
There is another narration, "Whoever reads surah Yaaseen for the pleasure of Allah only, all his earlier sins are forgiven. Therefore, make a practice of reading this surah over your dead."
According to one hadith, surah Yaaseen is named in the Torah as Mun'imah (giver of good things), because it contains benefits for its reader in this life as well as in the Hereafter; it removes from him the afflictions of this world and the next and takes away the dread of the next life.
This 'surah' is also known as 'Raafi'ah Khaafidhaah', ie., that which exalts the status of the believers and degrades the unbelievers. According to a riwaayat, Rasulullah (Sallallahu Alayhi Wasallam) said, "My heart desires that surah Yaaseen should be present in the heart of every one of my ummat."
According to another hadith, if anybody recites surah Yaaseen every night and then dies, he dies as a shaheed (martyr).
It is reported in another hadith "Whoever reads surah Yaaseen, is forgiven; whoever reads it in hunger, is satisfied; whoever reads it having lost his way finds the way; whoever reads it on losing an animal finds the same. And when one reads it apprehending that his food will run short, that food becomes sufficient. And if one reads it beside a person who is in the throes of death, the same are made easy for him. And if anyone reads it on a woman experiencing difficulty in child-birth, her delivery becomes easy."
Maqri (Rahmatullah alaih) said, "If surah Yaaseen is read by one who fears the ruler or an enemy, he gets rid of this fear."
According to another hadith, if somebody reads surah Yaaseen and surah Was-Saaffaat on Friday and begs of Allah something, his prayer is granted.
(Most of the above has been drawn from Mazaahir-e-Haq, though the scholars of hadith have questioned some of the riwaayaat).
Source: Fazaa’il e Aamaal