Ma'arif al-Qur'an
Mufti Muhammad ShafiCommentary(Ha Meem ` Ayn Seen Qaf) Only Allah knows the meaning of these letters. The gist of the first five verses is as follows:Just as this surah was revealed to the Holy Prophet ﷺ for the ascertainment of the religious principles and for other benefits, similarly Allah Ta’ ala has been sending other prophets who preceded him. His Magnificence is such that whatever there is in the heavens and in the earth is His. He is the Supreme, the Most Magnificent. Even though some of the people of this world do not recognize and do not admit the greatness of His magnificence, yet the number of the angels in the heavens, who know Him and recognize His greatness, is so large that their load may, quite likely, cause the heavens to burst apart from above. A hadith narrated in Tirmidhi and Ibn Majah states that due to the large number of the angels, such crackling sounds are produced in the heavens as are produced when an excessive load is placed on something.
And that is how it should be, because throughout the heavens there is not even a space of four fingers left vacant by angels who are in the state of prostration.