Genesis 4:15-17

Revised Standard Version

¹⁵ Then the Lord said to him, “Not so!^[a] If any one slays Cain, vengeance shall be taken on him sevenfold.” And the Lord put a mark on Cain, lest any who came upon him should kill him. ¹⁶ Then Cain went away from the presence of the Lord, and dwelt in the land of Nod,^[b] east of Eden.

Beginnings of Civilization

¹⁷ Cain knew his wife, and she conceived and bore Enoch; and he built a city, and called the name of the city after the name of his son, Enoch.