Have you ever wondered how the Old Testament and New Testament tie together…… or do they?  We are a NT people and always need to look at the OT in light of the Cross and the finished work of Jesus.  There are many things in the OT that help clear up the picture of what the Lord wants to show us.  Pentecost is just one of those pictures. The word Pentecost is a Greek word but there is OT revelation that deals with a 50 day wait between Festivals.