Борис и Глеб
One example for an kondak-prosomoion whose music can be only reconstructed by a comparison with model of the kontakion as it has been notated into Middle Byzantine round notation, is Аще и убьѥна быста which was composed for the feast for Boris and Gleb (24 July) over the kondak-idiomelon Аще и въ гробъ for Easter in :