The murderer of a quarter of the world's population is Cain, or rather a sixth of the world's population, because the land at that time consisted of six individuals: Adam, Eve, Cain, and Abel and their two sisters, and in other accounts, Adam did not produce anything but Cain and Abel, and this is why Cain's killing of Abel was as if he killed a quarter of the earth's population.

Mrs. Eve gave birth to twins consisting of Cain and his sister, after which she conceived and gave birth to another twin, Cain and his sister, and when they grew up, God Almighty suggested that Cain marry Abel's twins and vice versa, but the matter did not suit Cain because he wanted to marry his twins, so he is more entitled to her than his brother because he is the eldest, but Adam Peace be upon him told him that God has revealed this to him.

But Cain refused this matter, saying (No, but you preferred it to me with your joy ...), so Adam suggested that both of them offer an offering or charity to God, and whoever accepts his charity is the first with it. The two brothers presented their charity to God, so God accepted the charity of Abel, and he did not accept the charity of Cain, because of the evils that he had in himself of the evils that he was the most knowledgeable about.

When God accepts Abel's charity, his brother Cain, who was working on the land, looked at him, saying (to kill you), and Abel answered him advising him who was working as a shepherd (God accepts from the righteous.) And he continued as a kind of guidance to his brother (because you extended your hand to me to kill me) I will not return you because I fear the punishment of the Lord of the Worlds, so I do not want to be one of the people of Hell that has prepared for the oppressors.)

But Cain did not pay any attention to his brother’s words, and he committed his crime and killed him, and left his body in the open, and it was the first crime to be committed on the face of the earth. The dead raven is in the dirt, and here Cain felt guilty, and he deeply regretted it and started repeating, (Oh my woe, could I not have done such a raven, and shrouded my brother’s body in the dirt?

As for other narrations, it says that Adam had a girl for the first time, and that girl was born and she was the first person to commit adultery on earth, so God resurrected whoever killed her. After that girl Adam had Cain, and after that Cain had with Abel. And when the two boys grew up, God sent a fairy called (Eimala), and he depicted her in the form of humanity, created a womb for her, and inspired Adam to marry her to Cain.

And he sent a nymph in the form of his forgiveness called (Terka), and he suggested to Adam that he would marry her to Abel, so Cain objected that he was the first with her from his brother because he was his eldest son, so Adam told his son that this is God’s command, but Cain did not pay any attention to his words. And to suggest to them to offer an offering to God and whoever accepts his offering is the first.