Let all moral flesh keep silence, and with fear and trembling stand. Ponder nothing earthly minded, for with blessing in His hand, Christ our God to earth descended, our full homage to demand
King of kings yet born of Mary, as of old on earth He stood. Lord of lords, in human vesture, in the body and the blood. He will give to all the faithful, His own self for heav’nly food.
At his feet the six-winged Seraph, Cherubim, with sleepless eye, veil their faces to the presence, as with ceaseless voice they cry, Alleluia, Alleluia, Alleluia, Lord most high!
Ancient hymn, with a beautiful recording available here.