In ancient times, a little boy named Tokusho offered a rice cake made of sand to the Buddha. Due to this merit he was reborn as the Emperor the king of Jambudvīpa. You have donated five shō of polished rice. How can you not become a Buddha? This will be especially so in this period of hunger and thirst!

Hakumai Wakame Gosho, A Letter of Polished Rice and Wakame Seaweed, Writings of Nichiren Shōnin, Volume 6, Followers I, Page 170