Revelational Circumstances of the Qur'an: Surah 54 (Al-Qamar)

45. Soon shall the hosts be routed, and they shall turn (their) backs.
46. Nay, the hour is their promised time, and the hour shall be most grievous and bitter.

Narrated Ibn 'Abbas
The Prophet , while in a tent (on the day of the battle of Badr) said, "O Allah! I ask you the fulfillment of Your Covenant and Promise. O Allah! If You wish (to destroy the believers) You will never be worshipped after today." Abu Bakr caught him by the hand and said, "This is sufficient, O Allah's Apostle! You have asked Allah pressingly." The Prophet was clad in his armor at that time. He went out, saying to me: "There multitude will be put to flight and they will show their backs. Nay, but the Hour is their appointed time (for their full recompense) and that Hour will be more grievous and more bitter (than their worldly failure)." (54.45-46) Khalid said that was on the day of the battle of Badr.

Nay, but the Hour (of doom) is their appointed tryst, and the Hour will be more wretched and more bitter (than their earthly failure).

Narrated Yusuf bin Mahk
While I was with Aisha, the mother of the Believers, a person from Iraq came and asked, "What type of shroud is the best?" 'Aisha said, "May Allah be merciful to you! What does it matter?" He said, "O mother of the Believers! Show me (the copy of) your Qur'an," She said, "Why?" He said, "In order to compile and arrange the Qur'an according to it, for people recite it with its Suras not in proper order." 'Aisha said, "What does it matter which part of it you read first? (Be informed) that the first thing that was revealed thereof was a Sura from Al-Mufassal, and in it was mentioned Paradise and the Fire. When the people embraced Islam, the Verses regarding legal and illegal things were revealed. If the first thing to be revealed was: 'Do not drink alcoholic drinks.' people would have said, 'We will never leave alcoholic drinks,' and if there had been revealed, 'Do not commit illegal sexual intercourse, 'they would have said, 'We will never give up illegal sexual intercourse.' While I was a young girl of playing age, the following Verse was revealed in Mecca to Muhammad: 'Nay! But the Hour is their appointed time (for their full recompense), and the Hour will be more grievous and more bitter.' (54.46) Sura Al-Baqara (The Cow) and Surat An-Nisa (The Women) were revealed while I was with him." Then 'Aisha took out the copy of the Qur'an for the man and dictated to him the Verses of the Suras (in their proper order) .

On the day when they are dragged into the Fire upon their faces (it is said unto them): Feel the touch of hell.

Abu Huraira reported that the polytheists of the Quraish came to have an argument with Allah's Messenger (may peace be upon him) in regard to Destiny and then this verse was revealed:" On the day when they are dragged into the Fire upon their faces, taste the touch of Fire. Surely, We have created everything according to a measure" (liv. 48).