There are seven sequential surahs within the Qur’an – Ghafir (40), Fussilat (41), al-Shooraa (42), al-Zukhruf (43), al-Dhukhan (44), al-Jathiyah (45), & al-Ahqaf (46) – that all begin with the disconnected letters حم Ha Mim. These seven surahs are sometimes referred to as Āl Ha Mīm – “The Ha Mim Family” or al-Hawāmīm – “The Ha Mims”.
In the beginning of his explanation of the first of these surahs, surah Ghafir, al-haafidh Ismaa’eel ibn Kathir included the following statements from two of the sahabah:
قال عبد الله بن مسعود : ” آل حم ” ديباج القرآن .ـ
‘Abdullah ibn Mas’ood said, “The Ha Mim surahs are the adornment of the Qur’an.”
وقال ابن عباس : إن لكل شيء لبابا ولباب القرآن ” آل حم ” أو قال : الحواميم .ـ
Ibn ‘Abbaas said, “Everything had a core essence, and the core essence of the Qur’an is the Ha Mim surahs,” or he said, “al-Hawāmīm.”
قال مسعر بن كدام : كان يقال لهن : ” العرائس ” .ـ
Mis’ar ibn Kidam said, “People used to called them ‘the brides.'”
روى ذلك كله الإمام العلم أبو عبيد القاسم بن سلام ، رحمه الله ، في كتاب : ” فضائل القرآن ” . ـ
All of those reports were mentioned by the great scholar Abu ‘Ubayd al-Qasim ibn Salam in his book, Fadha’il al-Qur’an.