These are the Katabasiae of the Canon for Odes 1-9 on Cheese Fare (Forgiveness) Sunday, Tone 6/Plagal Second Mode. (The same are used on the Sunday of the Pharisee and Publican.) "When Israel walked on foot . . ."
These three hymns are sung during the Season of the Triodion, in Orthros as the Post-Gospel hymns after Psalm 50, from the Sunday of the Pharisee and Publican to the 5th Sunday of Lent. They are in Western & Byzantine notation. Tone 8/Plagal Fourth Mode & Tone 6/Plagal Second Mode. Updated 2/19/17.