Genesis 4:13

11Now you are cursed because of the ground, which has opened its mouth to receive your brother’s blood from your hand.

12From now on, when you till the ground, it won’t yield its strength to you. You will be a fugitive and a wanderer on the earth.”

13Cain said to the LORD, “My punishment is greater than I can bear.

14Behold, you have driven me out today from the surface of the ground. I will be hidden from your face, and I will be a fugitive and a wanderer on the earth. Whoever finds me will kill me.”

15The LORD said to him, “Therefore whoever slays Cain, vengeance will be taken on him sevenfold.” The LORD appointed a sign for Cain, so that anyone finding him would not strike him.