Kathasaritsagara 3.6.27

Then he yoked a pair of bullocks, and recited a prayer for success, and after making an oblation to that tree, he began to plough there. And he remained under that tree night and day, and his wife always brought him his meals there. And in course of time, when the corn was ripe that piece of ground was, as fate would have it, unexpectedly plundered by the troops of a hostile kingdom. Then the hostile force having departed, the courageous man, though his corn was destroyed, comforted his weeping wife, gave her the little that remained, and after making an offering as before, remained in the same place, tinder the same tree. Tor that is the character of resolute men, that their perseverance is increased by misfortune. Then one night, when he was sleepless from anxiety and alone, a voice came out from that Aśvattha tree, " Somadatta, I am pleased with thee, therefore go to the kingdom of a king named Ádityaprabha in the land of Śríkantha; continually repeat at the door of that king, (after reciting the form of words used at the evening oblation to Agni,) the following sentence— ' I am Phalabhúti by name, a Bráhman, hear what I say: he who does good will obtain good, and he who does evil, will obtain evil;'— by repeating this there thou shalt attain great prosperity; and now learn from me the form of words used at the evening oblation to Agni;

Then he yoked a pair of bullocks, and recited a prayer for success, and after making an oblation to that tree, he began to plough there. And he remained under that tree night and day, and his wife always brought him his meals there. And in course of time, when the corn was ripe that piece of ground was, as fate would have it, unexpectedly plundered by the troops of a hostile kingdom. Then the hostile force having departed, the courageous man, though his corn was destroyed, comforted his weeping wife, gave her the little that remained, and after making an offering as before, remained in the same place, tinder the same tree. Tor that is the character of resolute men, that their perseverance is increased by misfortune. Then one night, when he was sleepless from anxiety and alone, a voice came out from that Aśvattha tree, " Somadatta, I am pleased with thee, therefore go to the kingdom of a king named Ádityaprabha in the land of Śríkantha; continually repeat at the door of that king, (after reciting the form of words used at the evening oblation to Agni,) the following sentence— ' I am Phalabhúti by name, a Bráhman, hear what I say: he who does good will obtain good, and he who does evil, will obtain evil;'— by repeating this there thou shalt attain great prosperity; and now learn from me the form of words used at the evening oblation to Agni;