17:20  

दातव्यमिति यद्दानं दीयतेऽनुपकारिणे ।
देशे काले च पात्रे च तद्दानं सात्त्विकं स्मृतम् ॥१७- २०॥

daatawyamiti yaddaanaM diiyate'nupakaariNe ।

deshe kaale cha paatre cha taddaanaM saattwikaM smRRitam ॥१७- २०॥

Source: Automatic ITRANS Transliteration

That donation given as charity, given to a non-reciprocator,
In a place and at a time and in a package is remembered as saattvic donation.

Source: Milind S. Pandit

Charity that is given as a matter of duty, to a deserving candidate who does nothing in return, at the right place and time, is called a Saattvika charity.

Source: The Bhagavad-Gita: The Sacred Song

That gift which is given out of duty, at the proper time and place, to a worthy person, and without expectation of return, is considered to be charity in the mode of goodness.

Source: Bhagavad Gita As It Is