Ungan Donjo

The thirty-seventh patriarch was Great Master Yun-yen Wu-chu. He studied at first with Pai-chang for twenty years and, afterward, he studied with Yao-shan. Yao-shan asked him, "What Dharma does Pai-chang teach?" The master said, "Once he entered the hall to speak and all the monks were standing in rows. He suddenly scattered them with his staff. Then, he called out 'O monks!' When they turned around, Pai-chang asked, "What is it?" Yao-shan said, "Why didn't you say that before? Today, thanks to you, I have been able to meet brother Huai-hai." With these words, the master was greatly awakened.