The Prophet Muhammad (saw) said, ‘Surely everything has a heart, and the heart of the Qur’an is Yasin. I would love that it be in the heart of every person of my people’[Bazzar]. The Prophet Muhammad (saw) said, ‘Whoever recites Yasin once Allah will record the reward of reciting the Qur’an ten times.It has been reported by Aisha (ra)that the Prophet (saw) said that there is a surah in the Qur’an that intercedes for its reciter and forgive its listener.
Know! It is Surah Ya-sin. It is called ‘Mu’amma’ in the Torah. It was enquired, what is Mu’amma? The Prophet (saw) said, ‘it embraces the person with the goodness of this world and removes the dismay of the Hereafter.
The Prophet Muhammad (saw) said, ‘Whoever recited Surah Ya-sin in the night seeking Allah’s pleasure, Allah would forgive him.) relates that the Messenger of Allah (Allah’s blessings and peace be upon him, his family,
companions, and followers) said,”Ya Sin is the heart of the Qur’an. No one reads it intending thereby Allah and the Next Abode except that Allah forgives them. Recite it for your deceased-ones.”
Imam Ghazali explained that this is because soundness of faith rests on acknowledging Resurrection and Judgment, and Surat Ya Sin details this in the most emphatic of ways. Imam Fakhr al-Din al-Razi