"He Who is seated upon the Cherubim and upon the foal for us..."

Christ's Entry into Jerusalem on Palm Sunday (source)

 
He Who is seated upon the Cherubim and upon the foal for us, and has arrived at His Passion willingly, today He hears from the Children the: "Hosannah", the multitudes crying out: "O Son of David, hasten to save those whom You have fashioned, O Blessed Jesus! For because of this You have come, that we might come to know Your glory."
-Kathisma from the Matins for Christ's Entry into Jerusalem on Palm Sunday.
 
(source)
 

Through the prayers of our Holy Fathers, Lord Jesus Christ our God, have mercy on us and save us! Amen!