Prayer for the Souls in Purgatory, to be said When the Church Bell is Tolled or after the Evening Angelus

Thy mercy, Lord, we humbly crave
For souls whom Thou didst die to save.
Suffering amidst the cleansing fire,
To see Thy face they yet aspire.
Grant them, O Lord, a swift release,
And bring them where all pain shall cease.

Eternal rest give unto all the faithful departed, O Lord, and let perpetual light shine upon them.  May they rest in peace.  Amen.
-The Catechism Explained, Imprimatur 1927 -