Al-Bukhari recorded that `Abdur-Rahman bin Yazid said that `Abdullah said, "Banu Isra'il, Al-Kahf, Maryam, Ta Ha and Al-Anbiya' - they are among the earliest and most beautiful Surahs and they are my treasure."
بِسْمِ اللَّهِ الرَّحْمَـنِ الرَّحِيمِ
In the Name of Allah, the Most Gracious, the Most Merciful.
The Hour is at hand but People are heedless
This is a warning from Allah of the approach of the Hour, and that people are heedless of it, i.e., they are not working for it or preparing for it. An-Nasa'i recorded that Abu Sa`id reported from the Prophet :
Then in اَفَھُم یؤمِنُونَ (Will they believe?) there is a hint that there was no likelihood of these people accepting the true faith even after seeing the miracles of their choice. Hence they were not shown the desired miracle.
Tazkirul Quran
Maulana Wahiduddin KhanOn ayahs 6–8
The messenger of truth always presents the truth on the strength of sound arguments. When the Prophet’s opponents felt that they could not counter his arguments with their own arguments, they tried to dissuade the people from treading the path of truth by levelling different types of false allegations, such as saying that this (the divine discourse in the Quran) was mere poetry, that it was literary magic, that these were the senseless ramblings of a madman, that it was all self-devised, etc. Since the Prophet Muhammad did not perform any miracles before the people of Makkah, they cast aspersions on his prophethood by raising the issue of why he had not brought any miracle from God, like the other prophets in the past. Throughout the history of religion, experience has shown that those who do not accept the truth on the presentation of sound arguments, refuse to accept it even after seeing a miracle. Therefore, it is essential for the well wishing of the people that admonition on the strength of arguments be continued, instead of concluding the process of preaching by performing a miracle, because the rejection of a miracle invites the wrath of God. Consequently, the next stage can only be the destruction of the deniers.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.