Abū Huraira reported God’s messenger as saying, “A thousand years before creating the heavens and the earth God recited Tā’ Hā’ (Qur’ān, 20) and Yā’ Sīn, and when the angels heard the recitation they said, ‘Happy are a people to whom this comes down, happy are the minds which carry this, and happy are the tongues which utter this’.”
Anas reported God’s messenger as saying, “Everything has a heart, and the heart of the Qur’ān is Yā Sīn (Qur’ān, 36). God will record anyone who recites Yā Sīn as having recited the Qur’ān ten times.”
Tirmidhī and Dārimī transmitted it, Tirmidhī saying this is a gharīb tradition.
He reported God’s messenger as saying, “If someone recites Hā’ Mīm ad-Dukhān (Qur’ān, 44) any night, seventy thousand angels will ask forgiveness for him in the morning.”
Tirmidhī transmitted it, saying that this is a gharīb tradition and that ‘Umar b. Abū Khath'am the transmitter is declared to be weak. Muhammad, i.e. Bukhārī, said his traditions were rejected.
Abūd Dardā’ reported God’s messenger as saying, “He who recites three verses at the beginning of al-Kahf will be protected from the trial of the dajjāl.”
Tirmidhī transmitted it, saying this is a hasan sahīh tradition.