Irenaeus: Demonstration of the Apostolic Preaching

17. And when they were put out of Paradise, Adam and his wife. Eve fell into many troubles of anxious grief, going about with sorrow and toil and lamentation in this world. For under the beams of this sun man tilled the earth, and it put forth thorns and thistles, the punishment of sin. Then was fulfilled that which was written: Adam knew his wife, and she conceived and bore Cain; and after him she bare Abel. Now the apostate angel, who led man into disobedience and made him sinful and caused his expulsion from Paradise, not content with the first evil, wrought a second on the brothers; for filling Cain with his spirit he made him a fratricide. And so Abel died, slain by his brother; signifying thenceforth that certain should be persecuted and oppressed and slain, the unrighteous slaying and persecuting the righteous. And upon this God was angered yet more, and cursed Cain; and it came to pass that everyone of that race in successive generations was made like to the begetter. And God raised up another son to Adam, instead of Abel who was slain.