Remember, when He affected you a sort of drowsiness to give you calm from Himself and He showered rain upon you from the Heaven to purify you with it and to remove from you the filth of Satan to unite your hearts and brace your feet.
The weakling believers were few in numbers and they had no experience in war. They must face thousands of armed forces having vehement in battle. So, the Three-Time-Knower Lord Who knows the inner hearts of mankind showered drowsiness of peace and tranquility as well as rain to purify the believers and to remove satanic feelings from them. If this calmness was affected on the previous night of Battle of Bad’r, it had affected them at the night after the Battle of Uhud as explained in verse 3: 154. Remember that the Battle of Uhud was taken place to differentiate the hypocrites among the Arabic Quran reading Fujjar as told in verses 3: 166-167.
Since today, Adhikr is formed as a Book, whoever holdfasts It did holdfast Lord and he is guided into the Straightpath as explained in verses 3: 101 and 5: 48. The Splendid Book Adhikr mentioned in verse 41: 41 contains all the previous 312 Books and their upright Explanations. It is the Book for purifying the soul as told in verses 98: 2-3. Since only 1 in 1000 becomes a believer with Adhikr as per verse 4: 118, today harmony of mankind is only advised. It can be formed by identifying himself by reading and testifying Adhikr—the Food, Cloth, and Sight of the human soul—as explained in verses 6: 104 and 7: 26. See explanations 2: 213 and 3: 19-22.