you purify human hearts from sin
and make them whiter than snow.
Pour on us the abundance of your mercy.
Renew the Holy Spirit in us
that we may declare your praise,
be strengthened by your grace,
and obtain rest in the eternal mansions
of the heavenly Jerusalem;
through Jesus Christ our Lord.
Source: Sarum Rite
Source of this version: Freely modified from Prayers Ancient and Modern
by Mary Wilder Tileston, Boston, Little Brown, 1914, p. 320 #2
This prayer is a reflection on Psalm 51