Moving up to Genesis 27 we find the biblical descriptions and prophecies concerning Esau. This is where he loses the blessing to Jacob by his (Jacob's) tricking Isaac. Previously, Esau had already been tricked out of the birthright (Genesis 24) and so this is the second time Jacob had gotten from Esau what was rightfully his as the firstborn. As we read toward the end of the chapter we find Esau going to Isaac and pleading, "Please bless me, too!"
In the New King James Version it sounds as though verses 39 and 40 are a blessing from Isaac. They are not! It is a prophecy. It is not a blessing! He just said that he did not have anything left to give him. The blessing was an "all or nothing" portion of an inheritance. Verse 39 has been poorly translated: