When God made a covenent with Abraham,didn't he give him his word?

This was in the beginning. When He gave Abraham His word and Abraham believed the promise, that God would send His Son to redeem His people.This is when the word was with GOD. Now Jesus made the word true,and fulfilled all of the law. Jesus said it is finished and got the Keys of death,which made the word of God fulfilled. So the word is God, Amen