“Kṛṣṇa, You have come to me to take some fruit in exchange for grains. All the grains have fallen, but still You may take whatever You like.” Thus she filled Kṛṣṇa’s palms with whatever fruits He could carry. In exchange, Kṛṣṇa filled her whole basket with jewels and gold.
Srimad Bhagavatam
By His Divine Grace. A.C. Bhaktivedanta Swami Prabhupada
Canto Ten, Chapter 11, Text 11
phala-vikrayiṇī tasya
cyuta-dhānya-kara-dvayam
phalair apūrayad ratnaiḥ
phala-bhāṇḍam apūri ca
While Kṛṣṇa was going to the fruit vendor very hastily, most of the grains He was holding fell. Nonetheless, the fruit vendor filled Kṛṣṇa’s hands with fruits, and her fruit basket was immediately filled with jewels and gold.
In Bhagavad-gītā (9.26) Kṛṣṇa says:
patraṁ puṣpaṁ phalaṁ toyaṁ
yo me bhaktyā prayacchati
tad ahaṁ bhakty-upahṛtam
aśnāmi prayatātmanaḥ
Kṛṣṇa is so kind that if anyone offers Him a leaf, a fruit, a flower or some water, He will immediately accept it. The only condition is that these things should be offered with bhakti (yo me bhaktyā prayacchati). Otherwise, if one is puffed up with false prestige, thinking, “I have so much opulence, and I am giving something to Kṛṣṇa,” one’s offering will not be accepted by Kṛṣṇa. The fruit vendor, although a woman belonging to the poor aborigine class, dealt with Kṛṣṇa with great affection, saying, “Kṛṣṇa, You have come to me to take some fruit in exchange for grains. All the grains have fallen, but still You may take whatever You like.” Thus she filled Kṛṣṇa’s palms with whatever fruits He could carry. In exchange, Kṛṣṇa filled her whole basket with jewels and gold.
From this incident one should learn that for anything offered to Kṛṣṇa with love and affection, Kṛṣṇa can reciprocate many millions of times over, both materially and spiritually. The basic principle involved is an exchange of love. Therefore Kṛṣṇa teaches in Bhagavad-gītā (9.27):
The Hare Krishna Movement 