Byzantine Chant from Great and Holy Saturday

Here is a video featuring a Byzantine Chant setting of the hymn "Let All Mortal Flesh" which is sung as the Cherubic Hymn on Great and Holy Saturday.

An English translation of the Greek text is:

Let all mortal flesh keep silence, and with fear and trembling stand; ponder nothing earthly-minded, for the King of kings, the Lord of lords, will give to all the faithful His own self for heavenly food. Rank on rank the host of heaven spreads its vanguard on the way, the Principalities, the Authorities, the Cherubim with countless eyes, the six-winged Seraphim, veil their faces to the presence, as with ceaseless voice they cry: Alleluia