Sayyiduna Abu Hurairah, may Allah be pleased with him, narrates this statement of the Prophet Muhammad, peace and blessings be upon him: "Indeed, there is a surah in the Qur'an which has thirty verses. This surah will continue to seek forgiveness for its reciter until that person is forgiven. (That surah is) «تَبَارَكَالَّذِيبِيَدِهِالْمُلْكُ», so Abu Usamah affirmed his statement by saying: Yes."
(Imam Ibn Hibban, may Allah have mercy on him, says:) The statement of the Prophet Muhammad, peace and blessings be upon him, "It seeks forgiveness for its companion (i.e., the one who regularly recites or memorizes it)" means the reward of its recitation. Here, the application of the name is upon the result obtained from it, and that is the reward. Just as the application of the name of the surah is also upon its very existence. Similarly, in the narration transmitted from Sayyiduna Abu Umamah, may Allah be pleased with him, the meaning of the Prophet Muhammad's statement is the reward of reciting the Qur'an, Surah Al-Baqarah, and Surah Aal-e-Imran, because the Arabs, in their idiom, sometimes apply a name to the result obtained from it, as we have mentioned earlier.
Hadith Referenceصحیح ابن حبان / كتاب الرقائق / 787
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيحسن لغيره - «صحيح أبي داود» (1265).فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده حسن، عباس الجشمي: يقال: اسم أبيه عبد الله، روى عن عثمان وأبي هريرة، وعنه قتادة، وسعيد الجريري، وذكره المؤلف في «الثقات» 5/ 259 وباقي رجاله ثقات رجال الشيخين.