Irenaeus: Demonstration of the Apostolic Preaching

22. Now after the Flood God made a covenant with all the world, even with every living thing of animals and of men, that He would no more destroy with a flood all that grew upon the earth. And He set them a sign (saying): When the sky shall be covered with a cloud, the bow shall be seen in the cloud; and I will remember my covenant, and will no more destroy by water every moving thing upon the earth. And He changed the food of men, giving them leave to eat flesh: for from Adam the first-formed until the Flood men ate only of seeds and the fruit of trees, and to eat flesh was not permitted to them.

But since the three sons of Noah were the beginning of a race of men, God blessed them for multiplication and increase; saying: Increase and multiply, and replenish the earth and rule it; and the fear and dread of you shall be upon every living thing of animals and upon all the fowls of the air; and they shall be to you for meat, even as the green herb: but the flesh with the blood of life ye shall not eat: for your blood also will I require at the hand of all beasts and at the hand of man. Whoso sheddeth a man’s blood, in return for his blood shall it be shed. ^{Edition note 1} For He made man the image of God; and the image of God is the Son, after whose image man was made: and for this cause He appeared in the end of the times that He might show the image (to be) like unto Himself. ^{Edition note 2} According to this covenant the race of man multiplied, springing up from the seed of the three. And upon the earth was one lip, that is to say one language.