And Esau hated Jacob because of the blessing wherewith his father blessed him: and Esau said in his heart, The days of mourning for my father are at hand; then will I slay my brother Jacob.
Esau hated Jacob. It is scarcely to be wondered at that Esau resented the conduct of Jacob, and vowed revenge.
The days of mourning for my father - a common Oriental phrase for the death of a parent. It very frequently happens in the East that brothers at variance wait for the death of their father to avenge among themselves their private quarrels.