I have heard that the covenant ceremony in Genesis 15 served as ratification of God's Covenant with Abram, which existed in its whole as a suzerain-vassal treaty, like the one God used at Sinai. My understanding is that these are two completely different covenant ceremonies. In Genesis 15 we have an example of one common covenant ceremony (royal land grant), and in Exodus a different common treaty model (suzerain-vassal). What is your understanding of these passages?
Dr. Richard L. Pratt, Jr. is Co-Founder and President of Third Millennium Ministries who served as Professor of Old Testament at Reformed Theological Seminary and has authored numerous books.