Invitatory
The Invitatory is the psalm used to start Nocturns in the Liturgy of the Hours, the Catholic Church's Divine Office. It is usually Psalm 94, which begins Venite exsultemus in Latin. After the reform of the Liturgy of the Hours following the Second Vatican Council, the Invitatory is said either before the Office of Readings or Lauds, whichever is said first in a liturgical day. In place of Psalm 94, Psalm 99, Psalm 66, or Psalm 23 may be used as circumstances may suggest.
Verse 17 of Psalm 50 Domine, labia mea aperies is often used as the invitatory antiphon in the Liturgy of the Hours.Footnotes
