He took the stone and embedded it in the forehead of Abel, and slew him, as it is said, "And Cain rose up against Abel his brother, and slew him" (ibid.).
Rabbi Jochanan said: Cain did not know that the secrets are revealed before the Holy One, blessed be He. He took the corpse of his brother Abel and hid it in the field. The Holy One, blessed be He, said to him: "Where is Abel thy brother?" (Gen. 4:9). He replied to Him: Sovereign of the world! A keeper of vineyard and field hast Thou made me. A keeper of my brother Thou hast not made me; as it is said, "Am I my brother's keeper?" (ibid.). The Holy One, blessed be He, said to him: || "Hast thou killed, and also taken possession?" (1 Kings 21:19). "The voice of thy brother's blood crieth unto me from the ground" (Gen. 4:10). When Cain heard this word he was confused. And He cursed him, that he became a wanderer on the earth because of the shedding of the blood, and because of the evil death.