O Lumen Ecclesiae

Dominic is referred to as “Lumen Ecclesiae” (“Light of the Church”). The “O Lumen,” a hymn to Dominic, is sung nightly in the Dominican communities throughout the world.

Light of the Church, teacher of Truth, rose of patience, ivory of chastity. You freely poured forth the waters of wisdom. Preacher of grace, unite us with the blessed. 
V. Holy Father Dominic, pray for us (alleluia)
R. That we may be made worthy of the promises of Christ (alleluia)
Let us pray.
Grant, we beseech you, almighty God, that we, who are weighed down by the burden of our sins, might be supported by the intercession of the blessed Dominic, your confessor and our father, through Christ our Lord. Amen.