Then Abraham bowed down with his face to the ground and laughed ¹  as he said to himself, ²  “Can ³  a son be born to a man who is a hundred years old? ⁴  Can Sarah ⁵  bear a child at the age of ninety?” ⁶ 

So Esau hated ¹  Jacob because of the blessing his father had given to his brother. ²  Esau said privately, ³  “The time ⁴  of mourning for my father is near; then I will kill ⁵  my brother Jacob!”