This is a powerful simple prayer for forgiveness ideal for Reconciliation and Lent. For a short poem it has a long attribution. It has a Spanish text by Sara Menéndez de Hall, based on the English words of C. Maude Battersby here translated back into English by Janet W. May. The details of all that are here. This text is here.
It is set to CAMACUA by Pablo D. Sosa.
Apart from Gather 3rd edition, it’s sheet music can be purchased at GIA.