Genesis 4:11

Cain deserved to die, but God did not kill Cain. Instead, he sent Cain away so that Cain would not kill anyone else. And God protected Cain so that nobody else would kill Cain. (See verse 15.) So Cain might think about the evil deed that he had done. He might be truly sorry and God would forgive him.

v13 Cain said to the *Lord, ‘My punishment is too severe. v14 Today you send me away from this country. I will not be able to see your face. I will run away from people and I will wander on the earth. Anyone who finds me will kill me.’ v15 Then the *Lord said to Cain, ‘No. If anyone kills Cain, I will punish that person 7 times more severely.’ And the *Lord put a mark on Cain. So anyone who met Cain would see the mark. And he would not kill Cain. v16 Then Cain went away from the *Lord. He lived in the region that is called Nod. It is east of Eden.