cleanse us from our secret faults,
and mercifully forgive us from our willful sins,
that we may receive your holy things with a pure mind;
through Jesus Christ our Lord.
Source: Leonine Sacramentary.
Source of this version: Freely modified from Prayers of the Early Church, ed. J. Manning Potts, The Upper Room, Nashville, Tennessee, © 1953 (Public domain in the U.S.)
“cleanse us from our secret faults” is a reference to Psalm 19:12-13