Gaudete in Domino

The incipit for the Gregorian chant introit from which Gaudete Sunday gets its name.

This coming Sunday, the Third Sunday of Advent, has traditional been known as Gaudete Sunday, after the introit of the Latin MassRose vestments may be worn and a rose candle is often lit on the Advent Wreath.

Gaudéte in Dómino semper: íterum dico, gaudéte. Modéstia vestra nota sit ómnibus homínibus: Dóminus enim prope est. Nihil solíciti sitis: sed in omni oratióne petitiónes vestræ innotéscant apud Deum. Benedixísti Dómine terram suam: avertísti captivitátem Jacob. 

Rejoice in the Lord always. Again I say, rejoice; let your forbearance be known to all, for the Lord is near at hand; have no anxiety about anything, but in all things, by prayer and supplication, with thanksgiving, let your requests be known to God.
(Philippians 4:4-6).

Giovanni Vianini
, Schola Gregoriana
Mediolanensis, Milano, Gaudete in Domino, Tone 1 [YouTube] (preceded by BWV 722)