And the Lord said, "What have you done? Listen; your brother's blood is crying out to me from the ground!
And now you are cursed from the ground, which has opened its mouth to receive your brother's blood from your hand.
When you till the ground, it will no longer yield to you its strength; you will be a fugitive and a wanderer on the earth."
Cain said to the Lord, "My punishment is greater than I can bear!
Today you have driven me away from the soil, and I shall be hidden from your face; I shall be a fugitive and a wanderer on the earth, and anyone who meets me may kill me."
Then the Lord said to him, "Not so! Whoever kills Cain will suffer a sevenfold vengeance." And the Lord put a mark on Cain, so that no one who came upon him would kill him.
References for Genesis 4:15
Then Cain went away from the presence of the Lord, and settled in the land of Nod, east of Eden.
References for Genesis 4:16
Cain knew his wife, and she conceived and bore Enoch; and he built a city, and named it Enoch after his son Enoch.
To Enoch was born Irad; and Irad was the father of Mehujael, and Mehujael the father of Methushael, and Methushael the father of Lamech.
Lamech took two wives; the name of the one was Adah, and the name of the other Zillah.
Adah bore Jabal; he was the ancestor of those who live in tents and have livestock.