At each service daily, a prayer, or 'collect' is used from the Book of Common Prayer. The collect for this week the Twenty-first Sunday after Trinity is:
GRANT, we beseech thee, merciful Lord, to thy faithful people pardon and peace, that they may be cleansed from all their sins, and serve thee with a quiet mind; through Jesus Christ our Lord. Amen.
Our PDF booklet of all the Prayer Book collects is available here.