At each service daily, a prayer, or 'collect' is used from the Book of Common Prayer. The collect for this week, the Third Sunday of Lent is:
WE beseech thee, Almighty God, look upon the hearty desires of thy humble servants, and stretch forth the right hand of thy Majesty, to be our defence against all our enemies; through Jesus Christ our Lord. Amen.
Our PDF booklet of all the Prayer Book collects is available here.