A further hypothesis maintains that, once the Priestly Code was promulgated, the Exodus narrative took on a central function, as the apotropaic rite was, arguably, amalgamated with the Canaanite agricultural festival of spring which was a ceremony of unleavened bread, connected with the barley harvest. As the Exodus motif grew, the original function and symbolism of these double origins was lost.[18] Several motifs replicate the features associated with the Mesopotamian Akitu festival.[19] Other scholars, John Van Seters, J.B.Segal and Tamara Prosic disagree with the merged two-festivals hypothesis.[20]