Cain and Abel
Tell them the story of Adam’s two sons, when they each offered a sacrifice. One was accepted, the other was not. The rejected one said, “I will kill you!” The other replied, “Allah accepts only from the righteous.”
5:27But recite unto them with truth the tale of the two sons of Adam, how they offered each a sacrifice, and it was accepted from the one of them and it was not accepted from the other. (The one) said: I will surely kill thee. (The other) answered: Allah accepteth only from those who ward off (evil).