Garudapurana 2.4.34

2.4.34

bhavatyatra khagaśreṣṭha phalagaukhalāghavam /
śraddhāśraddhāvibhedena dānagauravalāghavāt //

Here, O best of birds, there is weight or lightness of result / according to the distinction of faith and lack of faith, from the greatness or smallness of the gift.