According to a well known and authentic tradition when Hadrat Umar set out to kill the Holy Prophet, he met a certain person, who said, "Before you do anything else, you should know that your own sister and brother-in-law have embraced Islam" Hearing this, he directly went to the house of his sister. There he found his sister, Fatimah, and his brother-in-law, Said bin Zaid, learning the contents of a scroll from Khabbab bin Art. When Fatimah saw him coming she hid the scroll at once, but Hadrat Umar had heard the recital, so he began to interrogate them about it. Then he began to thrash his brother-in-law, and wounded his sister, who tried to protect him. At last both of them confessed, "We have become Muslims; you may do whatever you like." As Hadrat Umar was moved to see blood running down from her head, he said, "Show me the thing you were reading." The sister asked him to promise on oath that he would not tear it, and added, "You cannot touch it unless you have a bath."

Accordingly, Hadrat Umar took his bath and when he began to read the scroll, which contained this Surah, he spontaneously spoke out, "What an excellent thing!" At this Hadrat Khabbab, who had hidden himself at the sound of his footsteps, came out of his hiding and said, By God, I have high expectations that Allah will get great service from you to propagate the Message of His Prophet.

For just yesterday I heard the Holy Prophet praying to Allah, 'My Lord, make Abul Hakam bin Hisham (Abu Jahl) or Umar bin Khattab a supporter of Islam. So O Umar, turn to Allah, turn to Allah." These words proved to be so persuasive that he at once accompanied Hadrat Khabbab and went to the Holy Prophet to embrace Islam. This happened a short time after the Migration to Habash.

                                                                                                                                                                                       Haroof Muqatta’at ( Taha , Aliflammeem ) the words used in Qu'ran that only Allah knows," he said something that we cannot understand. In other words, he put our intellect in its place, letting us know that if you really want guidance from this book, understand that you can't comprehend everything, and realize that Allah knows more than you do. What He gives you, you should make an  attempt to understand. You should ask Allah to give you understanding of this Deen, but ultimately, all knowledge belongs to Him. So, when you approach the book with an attitude of arrogance, you'll gain nothing. However, if you submit your intellect to Allah's word, you'll benefit, and the doors of wisdom will open.

The object of the revelation of the Quran is not to make the Prophet (peace be upon him) do something impossible and to put him to unnecessary distress by demanding from him to imbue the hearts of the obdurate people with faith, but to admonish those people who have fear of Allah. Therefore the Prophet (peace be upon him) should not waste his efforts on those people who have no fear of God left in them, and who do not bother at all about what is truth and what is falsehood.

Whoever Allah gives knowledge to,it is because Allah wants him to have an abundance of good.

This is confirmed in the Two Sahihs on the authority of Ibn Mas'üd, who said that the Messenger of Allah said : Whomever Allah wants good for, then he gives him the understanding of religion

But only as a Reminder to those who fear (Allah).

Allah revealed His Book and sent His Messenger as a mercy for His servants,

so that the person who reflects may be reminded.

Thus, a man will benefit from what he hears of the Book of Allah, it is a remembrance in which Allah revealed what He permits and prohibits.

He mentions earth first , something in the surah focuses on the earth more and something about heights.