THE POWER OF PROPHESY AND TONGUE

The bible says in Proverbs 18 : 21 that '' Death and life are in the power of the tongue and those who love it will eat its fruit''.
The tongue is one of the smallest part of the body that can be classified as the most dangerous weapon we have. I believe we have to be very careful on how we use it at anytime.
In Genesis 25 : 29 - 34 the bible says '' Now Jacob cooked a stew; and Esau came in from the field and he was weary. And Esau said to Jacob, 'please feed me with that same red stew, for i am weary'. Therefore his name was called Edom. But Jacob said ``sell me your birthright as of this day´´. And Esau said, look i am about to die so what is this birthright to me? Then Jacob said swear to me as of this day. So he swore to him and sold his birthright to Jacob. And Jacob gave Esau bread and stew of lentils, then he ate and drank, arose and went his way. Thus Esau despised his birthright''.
According to  the above scripture, two things are involve: First is the existence of spirit of diversion in the family. In Genesis 21 : 9 - 13 the bible says that Ishmael the son of Hagar was the first son of Abraham and was sent out of Abraham's house and Isaac was now recognised as Abraham's first son. And in Genesis 25 : 21 - 23  it says that Isaac pleaded with the Lord for his wife, because she was barren and the Lord granted his plea and Rebekah his wife conceived of twins and because the children struggled together within her, she went to inquire of the Lord what was happening and the Lord said 'Two nations are in your womb, two peoples shall be separated from your body; one people shall be stronger than the other, and the elder shall serve the younger'. But Rebekah and Isaac did not plead to God about it.  God is merciful to change any situation and it is unfair for the elder to serve the younger. God is so merciful to change any situation no matter how difficult it seems to be. In Isaiah 1 : 18 God said that we should come and let us reason together. Moreso, we saw also in the life of Jabez in 1 Chronicle 4 : 9 - 10 he prayed to God to enlarge his territory because his mother gave him Jabez meaning she bore him in pain and the merciful God visited his situation and turn it around.  Also, in 1 john 3 :22 says that whatever we ask, we receive when we keep His commandment.