Genesis 4:17 YLT

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.

¹⁸  And born to Enoch is Irad; and Irad hath begotten Mehujael; and Mehujael hath begotten Methusael; and Methusael hath begotten Lamech.

¹⁹  And Lamech taketh to himself two wives, the name of the one Adah, and the name of the second Zillah.