Genesis 4:15-16

15But the LORD said to him, “Not so Septuagint, Vulgate and Syriac; Hebrew Very well ; anyone who kills Cain will suffer vengeance seven times over.” Then the LORD put a mark on Cain so that no one who found him would kill him.

16So Cain went out from the LORD ’s presence and lived in the land of Nod, Nod means wandering (see verses 12 and 14). east of Eden.