There was once a king in Longhan named Zhouyu. He had unlimited sagely morality. People at that time had to suffer from eighty-four thousand kalpas. He had a jade concubine, who was wise and benevolent. She was called the Lady of the Purple Radiance, and made a promise to give birth to sagely sons to support the Heaven and Earth...She played in the courtyard, facing the jade pond of golden lotus and took off her clothes to take a bath. Suddenly she had a feeling, and the nine buds of lotus bloomed and became the nine sons.
Daozang. Vol 1, 872.