Ibn Babawaih states in Thawab Al-A'amal Book: Aban reported from Imam Abou Abdellah (Pbuh) that he said: "For he who recites Al-Zummar Chapter, Allah will give him the honor of Donia and the Hereafter. Allah will glorify him without money or clan till all who see him fear him and Allah will forbid hell to touch his body. Allah will build him one thousand cities in heaven. In each city, there are one thousand palaces and in each palace there are one hundred angelic-maids. He also earns two running springs, two joined heavens, angelic-maids waiting in their tents, and a pair from each fruit."
Al-Tabarsi states in Majma' Al-Bayan Book: The Messenger of Allah (Pbuhp) said: "For he who recites Al-Zummar Chapter Allah will not neglect his plea on Resurrection Day. Allah will give him the rewards of those who feared Allah."
Khawas Al-Quran Book: The Messenger of Allah (Pbuhp) said: "every prophet and sincere saint send their prayer upon and ask forgiveness for he who recites this chapter. When one writes it and hangs it on himself or place it in his bed, all who come to him and leave shall praise him. They will stay praising him by the kindness of Allah."