In Amplissimo §5

⁵ Finally, not to omit the expression of Our gratitude, We would have you know what satisfaction you have caused Us by the liberality with which your people are endeavoring to contribute by their offerings to relieve the penury of the Holy See. Many indeed and great are the necessities for which the Vicar of Christ as supreme Pastor and Father of the Church is bound to provide in order to avert evil and to promote the faith. Hence your generosity becomes an exercise and a testimony of your faith.