Shundo David Haye – Zen Priest

Near Mount Xuefeng there was a hermit who lived in a hut that he had built. For many years this man had not shaved his head. He made a wooden dipper for himself and would go to the side of a river, scoop the water into the dipper, and drink.
One day a monk visited him and asked, “What was Master Bodhidharma’s intention in coming from India?”
The master of the hut said, “The ravine is deep, so the handle of this dipper is long.”
The monk went back to the temple and told Master Xuefeng of his experience.
Master Xuefeng said: Wondrous! I will go there myself and see the real situation of the old master. I will know at once if he is genuine.
So one day Master Xuefeng, taking a razor, went to the hut with his attendant, to visit the old hermit. They looked at each other for a while then Master Xuefeng said, “If you can say anything about the truth, I will not shave your head.”
The hermit immediately washed his head with water. Then Master Xuefeng shaved his head for him.’ (Shinji Shobogenzo)

The hermit would not waste his breath a second time.