The Hymn of Kassiani, also known as the Hymn of the Fallen Woman, is a Penitential Hymn that is based on the Gospel reading for Holy Wednesday morning (Matthew 26:6-16), which speaks of a sinful woman who anoints Jesus' feet with costly ointment (distinguished from a similar incident with a different woman, St. Mary of Bethany). This hymn is chanted only once a year and considered a musical high-point of the Holy Week, at the Matins and Presanctified Liturgy of Holy Wednesday, in the Plagal Fourth Tone.