Genesis 4:10-11

Genesis 4:10-11

[10] And he said,  What  hast thou done?  the voice  of thy brother's  blood  crieth  unto me from the ground.  [11] And now art thou cursed  from the earth,  which hath opened  her mouth  to receive  thy brother's  blood  from thy hand; 

What is the context of Genesis 4:10-11?