雜譬喻經 1.82

1.82

有龍能以一渧水，雨一國者或二或三，乃至雨一閻浮提者。龍心自念言：「我欲藏此一渧水使常在而不乾，何處可得耶？」作是思惟：「餘處不得，唯當安著大海中乃不乾耳。」此喻少施而得大報無窮者，唯當安著佛道中也。此明水渧與龍智合故，所憑得處而不乾也。布施與般若合故，所置得處而不竭也。

There is a dragon that can rain upon one country, or two, or three, up to raining upon the whole of Jambudvīpa with a single drop of water. The dragon thought to itself: 'I wish to store this single drop of water so that it remains forever and does not dry up; where can such a place be found?' It reflected thus: 'Nowhere else will do; only by placing it in the great ocean will it not dry up.' This is an analogy for giving a little in dāna and obtaining an inexhaustible, great reward: it can only be done by placing it in the Buddha Way. This illustrates that because the drop of water was united with the dragon's wisdom, the place upon which it relied was attained, and it did not dry up. Because dāna is united with prajñā, the place where it is set is attained, and it is never exhausted.