Genesis 4:15-17

Young's Literal Translation

¹⁵ And Jehovah saith to him, `Therefore -- of any slayer of Cain sevenfold it is required;' and Jehovah setteth to Cain a token that none finding him doth slay him.

¹⁶ And Cain goeth out from before Jehovah, and dwelleth in the land, moving about east of Eden;

¹⁷ and Cain knoweth his wife, and she conceiveth, and beareth Enoch; and he is building a city, and he calleth the name of the city, according to the name of his son -- Enoch.