Rhag bod rhyw bechod cudd

Rhag bod rhyw bechod cudd
  Yn llechu dan fy mron,
O! chwilia 'nghalon, Iesu cu!
  A llwyr sancteiddia hon.

Yn Isräeliad gwir
  Gwna fi, heb dwyll na brâd;
Boed fy hyfrydwch yn fy Nuw,
  A'm cân am gariad rhâd.

gwelir:
  O Arglwydd chwilia'th was
  O Arglwydd gwêl dy was

Lest some hidden sin be
  Lurking in my breast,
O search my heart, dear Jesus,
  And sanctify it completely!

A true Israelite
  Make me, without guile or treachery;
May my delight be in my God,
  And my song about free love.

Cause me, O God of truth and grace,
  My real state to know;
If I am wrong, O set me right!
  If right, preserve me so!

Am I an Israelite indeed,
  Without a false disguise?
Have I renounced my sins, and left
  My refuges of lies?