"Oracion del dinero" is a Spanish phrase that literally means "prayer of the money." The prayer itself can take many forms, but is generally an invocation for divine providence of financial assistance or wealth.
Catholic believers commonly direct their prayers for money to God, but sometimes they choose to invoke a special saint, such as Saint Matthew. Saint Matthew is the patron saint of money because he worked as a tax collector for the Romans before he became one of the Twelve Apostles and the author of the first canonical gospel. Specific examples of prayers for money are available at Prayers-For-Special-Help.com.