al-'Ankabut
Imam Ja'fer al-Sadiq (as) has said, "One who recites it will receive ten good deeds for the number of each and every believer and disbeliever." He (as) has also said, "One who recites both Surat al- Rum and al-'Ankabut during the twenty-third night of the month of Ramadan will, by Allah, be among the people of Paradise."