A hymn sung during the Divine Liturgy of the Orthodox Church. It was supposedly written by Emperor Justinian. In English, it runs something like:

Let us who mystically represent the Cherubim
And who sing the thrice-holy hymn
to the life-creating Trinity
now lay aside all earthly cares,
that we may receive the King of All,
who comes invisibly upborne by the angelic host!
Alleluia, allelluia, alleluia!