The Advent I Alleluia: Ostende nobis Domine ("Show us thy mercy, O Lord")

The text is a very familiar one, taken from Psalm 85:7 (84:8 in the Vulgate):

Show us thy mercy, O Lord : and grant us thy salvation. 

Here's the full chant score:

Here are all the chants for the day, from ChristusRex.org:

Hebdomada Prima Adventus
Dominica Introitus: Ps. 24, 1-4 Ad te levavi (3m29.7s - 3275 kb) score
Graduale: Ps. 24, 3. V. 4 Universi, qui te exspectant (2m00.6s - 1887 kb) score
Alleluia: Ps. 84, 8 Ostende nobis (2m41.5s - 2525 kb) score
Offertorium: Ps. 24, 1-3 Ad te, Domine, levavi (1m41.0s - 1579 kb) score
Communio: Ps. 84, 13 Dominus dabit benignitatem (51.2s - 801 kb) score

And these are posts on Chantblog for the Advent 1 propers:

• The Introit: Ad Te Levavi Animam Meam
• The Gradual: Universi, qui te exspectant
• The Advent I Alleluia: Ostende nobis Domine ("Show us thy mercy, O Lord")
• The Offertory: Ad te, Domine, levavi
• The Communio:  Dominus Dabit
• The Advent Office