When you give to Krishna, you never lose, but it’s all GAIN!
The Supreme Lord Krishna is the bestower of all benedictions. If someone gives something to the Lord, he is not the loser; he is the gainer by a million times.
This is illustrated by the following narration from Srimad-Bhagavatam.
One day, a fruit vendor came before the house of Nanda Maharaja. Upon hearing the vendor call, “If anyone wants fruits, please come and take them from me!” child Krishna immediately took some grains in His palms and went to get fruits in exchange. But His palms were very small, and He was not very careful to hold the grains tight, so He was dropping them.
The vendor who came to sell fruits saw this and was very much captivated by the beauty of the Lord, so she immediately accepted whatever few grains were left in His palms and filled His hands with fruits. In the meantime, the vendor saw that her whole basket of fruit had become filled with jewels.
His Divine Grace Srila Prabhupada, the Founder-Acharya of ISKCON says: With love and affection, one should try to give something to Krishna from one's source of income. Then one's life will be successful. Krishna is full in all opulences; He does not need anything from anyone. But if one is prepared to give something to Krishna, that is for one's own benefit.