Once there were two boys named Unvanquished and Virtuous-Victory [who met the Buddha but had nothing of value to offer] so they offered a mud pie to the Buddha, and by virtue of this one of them was reborn as King Aśoka the lord of Jambudvīpa. After building 84,000 stupas and sending them to various countries, he was able to fulfill his long time wish and attain enlightenment.

Minobu-san Gosho, Mt. Minobu Letter, Writings of Nichiren Shōnin, Volume 5, Page 131