Wikipedia
Sūrat aṭ-Ṭāriq (, “The Piercing Star”, “The Nightcomer”, literally “The Knocker”) is the eighty-sixth sura of the Qur'an with 17 ayat. This chapter was sent to Mohammed when he was in Mecca.
In this chapter, God ( Allah) takes an oath by the sky and At-Tariq to say that there is an assigned watcher over every human being and all the deeds and sins done by human beings are being recorded. Allah then asks the human beings to think about how they were created. Allah then goes on to say that he has created human beings from the gushing water originating between backbone and ribs. Allah then reminds the human beings about the Judgment Day, the day when all the secrets would be revealed. On that day (Judgment Day), human beings would have no power and no one would help them. Allah then takes another oath on the heaven and the earth to say that, whatever being said here is word of Allah and must be taken very seriously. In the last three verses of the chapter, Allah says that the non-believers are plotting a scheme but in return Allah is also planning a scheme.