Eve said that God provided this son as a replacement for Abel "whom Cain slew"
[DOC] [TLE] Genesis 4:25 - YHVH.name [PAR] For Elohim, says [Eve] , has granted me another seed-child to replace Abel ... 
and she gave birth to a son and named him Seth, saying, 'God has granted me ... 
said she, hath appointed me another seed instead of Abel, whom Cain slew.