It is an important sunnat to say (or read) the Sura Yasin in the presence of the ill person. A hadith ash-Sharif declares, "If you say the Sura Yasin-i-Sharif in the presence of an ill person, he will die satiated with water and enter his grave satiated with water." That is, he will not feel the thirst caused by the throes of death. Since the Sura Yasin-i-Sharif tells about the things that will happen after the Resurrection, explains that this world is transitory and foretells the blessings in Paradise and the torment in Hell, when it is said in the presence of an ill person he will have heard the things that will cause him to die with iman. Reciting (or reading) the Sura Rad facilitates the soul's leaving the body. According to Hanafi Madhhab, when a person dies he becomes najs. The Qur'an can be read at some distance and silently, but not near him. However, he does not become najs according to the other three Madhhahib.
Even the dead will hear and get benefits from the Qur'an read. It is a sunnat for those who carry a janaza (dead person's body) to the grave or who visit a grave to say some part of the Qur'an and present the thawab to the dead person's soul without thinking of any worldly recompense.