Genesis 4:4-8

Genesis 4:4-8

[4] And Abel,  he  also brought  of the firstlings  of his flock  and of the fat  thereof. And the LORD  had respect  unto Abel  and to his offering:  [5] But unto Cain  and to his offering  he had not respect.  And Cain  was very  wroth,  and his countenance  fell.  [6] And the LORD  said  unto Cain,  Why art thou wroth?  and why is thy countenance  fallen?  [7] If  thou doest well,  shalt thou not be accepted?  and if thou doest not well,  sin  lieth  at the door.  And unto thee shall be his desire,  and thou shalt rule  over him. [8] And Cain  talked  with  Abel  his brother:  and it came to pass, when they were in the field,  that Cain  rose up  against  Abel  his brother,  and slew him. 

What is the context of Genesis 4:4-8?