A beautiful Japanese girl whose parents owned a food store lived near Hakuin. One day, without any warning, her parents discovered she was pregnant. This made her parents angry. She would not confess who the father was, but after much harassment at last named Hakuin.
In great anger the parents went to the master. "Is that so?" was all he would say.
After the child was born it was brought to Hakuin. By this time he had lost his reputation, which did not trouble him, but he took very good care of the child. He obtained milk from his neighbors and everything else the child needed.
A year later the girl could stand it no longer. She told her parents the truth - the real father of the child was a young man who worked in the fish market.
The mother and father of the girl at once went to Hakuin to ask forgiveness, to apologize at length, and to get the child back.
Hakuin willingly yielded the child, saying only: "Is that so?"
-from Zen Flesh, Zen Bones: A Collection of Zen and Pre-Zen Writings
"Just as the ocean has a single taste, the taste of salt, so this Dhamma and Discipline has a single taste, the taste of release."