Mohammad bin Yaqoub states in Al-Kafi Book: Moa'bbad reported from Imam Abou Abdellah (Pbuh) that he said: "Don’t stop reciting Al-Zalzala Chapter for he who recites it in his voluntary prayers Allah will never allow him to encounter any earthquake. He doesn’t die because of it or because of lightening, or any of the misfortunes and illnesses of Donia till he dies normally. When he dies an honored angels descends to him sent by his lord to sit next to his head. This angel will say: "O Angel of death, be gentle on the follower of Allah. He used to remember me a lot and he used to recite this chapter frequently. Then this chapter will say to him the same words. Then the angel of death will say: "Allah ordered me to listen to him and obey him. I shall not extract his soul until he orders me to do it. When he orders me I shall extract his soul." The angel of death will sit next to him till he commands him to take his soul. When the veil is uncovered he will see his houses in heaven. Thus the angel of death will take his soul in the most gentle way. Then seventy thousand angels will escort his soul to heaven."
Al-Sheikh Al-Sadouq states in Oyun Akhbar Al-Rida (Pbuh): Dawood bin Suleiman Al-Farra' reported from Imam Rida (Pbuh) reported from his forefathers (Pbut) from Ameer Elmo'mineen (Pbuh) that he said: " The Messenger of Allah (Pbuhp) said: "Reciting Al-Zalzala Chapter four times is equivalent to reciting the entire Quran."
Thawab Al-A'amal Book: Mo'abbad reported from Imam Abou Abdellah (Pbuh) that he said: " Don’t stop reciting Al-Zalzala Chapter for he who recites it in his voluntary prayers Allah will never allow him to encounter any earthquake. He doesn’t die because of it or because of lightening, or any of the misfortunes and illnesses of Donia till he dies normally. When he dies Allah orders him to go to heaven saying: "My servant, I allowed you to enter my heaven. Dwell wherever you please. You aren’t prevented."
Khawas Al-Quran Book: Imam Sadiq (Pbuh) said: "When one writes it and hangs it on himself when entering to a Sultan that he fears, he shall be saved from what he fears and worries him. Writing it in a new bowl that hasn’t been used before cures a patient suffering from bell's palsy when he looks at it three times or less. He is relieved from his pain also."