Contemplating the attainment of Buddhahood by Venerable Maudgalyāyana and his mother, you have a grandson, Lord Jibu, who is a Buddhist priest. This priest is neither an upholder of precepts nor especially rich in wisdom. He neither observes even one of the 250 precepts nor maintains even one of the 3,000 solemn rules of conduct. In wisdom he is like a horse or cow while in dignity he is like a monkey. Nevertheless, what he reveres is Śākyamuni Buddha and what he believes in is the Lotus Sūtra. This is like a snake holding a gem or a dragon gratefully holding the relics of the Buddha in Dharma Body.

A wisteria vine can climb up a deep valley by hanging on to a pine tree, and a crane can fly the distance of 10,000 li by relying on its wings. These are accomplished not by their own strength. The same is true with Jibu-bō. He himself is like a wisteria vine, but he will be able to climb up the highest rank of enlightenment by hanging on to the pine tree of the Lotus Sūtra. He will be able to fly through the sky of tranquil light by flapping the wings of the One Vehicle teaching of the Lotus Sūtra. He is a Buddhist priest who can make use of this pair of wings to pray for the repose of his parents, grandfathers, grandmothers and all the descendants through seven generations. You are the lady who possesses such a precious treasure, are you not?

Urabon Gosho, On theUllambana Service, Writings of Nichiren Shōnin, Faith and Practice, Volume 4, Page 175-176