This equal voice motet of Charpentier was most likely scored for treble voices and a small orchestra with basso continuo, but it works wonderfully as an a cappella motet for TTB voices. Enjoy!
Sub tuum praesidium | Charpentier | TTB | 3'
Under thy patronage do we fly,
O holy Mother of God;
despise not our prayers in our necessities,
but deliver us from all dangers,
O ever glorious and blessed Virgin.