Dominus — Sanctus

: It also echoes Revelation 4:8 and Matthew 21:9 , specifically the "Hosanna" and "Benedictus" ("Blessed is he who comes in the name of the Lord") shouted during Jesus’ entry into Jerusalem.

: The first part is drawn from Isaiah 6:3 , where seraphim (six-winged angels) cry these words while surrounding God's throne. Sanctus Dominus

The full liturgical text, “Sanctus, Sanctus, Sanctus, Dominus Deus Sabaoth” ("Holy, Holy, Holy, Lord God of hosts"), combines ancient visions from both the Old and New Testaments: : It also echoes Revelation 4:8 and Matthew