Mishkat al-Masabih 2149

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.