The document summarizes a story from the Quran about the two sons of Adam. One son killed the other out of jealousy after his sacrifice was accepted by God but the other's was not. He was encouraged by his inner self/desires (nafs) to do so. After killing his brother, he regretted it deeply when a crow showed him how to bury the body. He realized he had lost both in this life and the next due to his actions. The story conveys the importance of controlling one's inner desires and not giving in to wrongdoing like murder.