Bhagavad Gita: Chapter 17, Verse 20

दातव्यमिति यद्दानं दीयतेऽनुपकारिणे |
देशे काले च पात्रे च तद्दानं सात्विकं स्मृतम् ||

Charity given to a worthy person simply because it is right to give, without consideration of anything in return, at the proper time and in the proper place, is stated to be in the mode of goodness