Many Catholics are familiar with a prayer more commonly known as the "Prayer of St. Ignatius." It is on the back of prayer cards and is often memorized. Yet this prayer for generosity was not written by him at all.
Jesuit priest Fr. Jack Mahoney details the history of this prayer on the website Thinking Faith. It dates back only to the late 19th century and is not found in any of St. Ignatius' writings.
At the same time, the prayer is certainly in the "spirit" of St. Ignatius and is one of the most popular Catholic prayers around.
Here you can find this prayer for generosity, asking God to give you a more generous heart.