At each service daily, a prayer, or 'collect' is used from the Book of Common Prayer. The collect for this week, the Sixteenth Sunday after Trinity is:
O LORD, we beseech thee, let thy continual pity cleanse and defend thy Church; and, because it cannot continue in safety without thy succour, preserve it evermore by thy help and goodness; through Jesus Christ our Lord. Amen.
Our PDF booklet of all the Prayer Book collects is available here.