A Sessional Hymn is a set of troparia (hymns) chanted after each kathisma from the Psalter at Matins which is normally preceded by a small litany. In Slavonic it is called a sedálen from sediti, "to sit" (Cf. Latin sedere, "to sit"). Hymns with the same name are also used after the third ode of the canon.
- The Festal Menaion (Tr. Mother Mary and Archimandrite Kallistos Ware, Faber and Faber, London, 1984), p. 553.