Yunmen Wenyan (862 or 864[1] – 949 CE), (雲門文偃; Japanese: うんもんぶんえん, Ummon Bun'en; also known in English as "Unmon", "Ummon Daishi", "Ummon Zenji"), was a major Chan master in Tang-era China. He was a dharma-heir of Xuefeng Yicun
Yunmen's Three-in-One:
To understand three when one is raised, to judge precisely at a glance this is the everyday food and drink of a patchrobed monk.
The Highest Meaning of the Holy Truths, Pointer, Case 1 Blue Cliff Record (BCR)
Three phrases are inherent in every one phrase of Yun Men; since the source inspiration of his family is like this, when Yun Men utters a phrase, it must be returned to the source. Anything but this will always be phony.
Yun Men's Every Day is a Good Day, Commentary, Case 6 BCR
The great master Yun Men often taught people with one word Ch'an, though in the one word the three phrases were always present.
Ts'ui Yen's Eyebrows, Commentary, Case 8 BCR
As usual, within one sentence of Yun Men three sentences are bound to be present. These are called the sentence that encloses heaven and earth, the sentence that follows the waves, and the sentence that cuts off the myriad streams.
Yun Men's Appropriate Statement, Commentary, Case 14 BCR
Strip off the blinders, unload the saddle pack—this is the season of the great peace. If you can discern the phrase outside of patterns, then when one is raised you understand three.
Yun Men's Upside-Down Statement, Pointer, Case 21 BCR
You must understand how Yun Men raises one and illuminates three, raises three and illuminates one. If you go to his three phrases to seek, then you're pulling an arrow out of the back of your head. In a single phrase of Yun Men's, three phrases are inevitably present: the phrase that contains heaven and earth, the phrase that follows the waves and pursues the currents, and the phrase that cuts off the myriad streams.
Yun Men's The Body Exposed, The Golden Wind, Commentary, Case 27 BCR
Isn't such conversation by fellows who raise one and understand three, see the root and pursue the branches?
Ma Ku Carrying his Ring-Staff, Commentary, Case 31 BCR
Yun Men has phrases that cut nails and shear through iron. In this one phrase three phrases are present.
Yun Men's Every Atom Samadhi, Pointer, Case 50 BCR
Hsueh Tou understands how to add footnotes exceptionally well. He is a descendant of Yun Men, with the hammer and tongs to have three phrases present in every single phrase.
Tao Wu's Condolence Call, Verse Commentary, Case 55 BCR
As Chih Men was a venerable adept in the congregation of Yun Men, each of his phrases had to contain three phrases; that is, the phrase that contains heaven and earth, the phrase that cuts off the myriad streams, and the phrase that follows the waves.
Chih Men's Body of Wisdom, Commentary, Case 90 BCR
This story is just like this; within one phrase there are three phrases naturally inherent—the phrase enclosing heaven and earth, the phrase cutting off all streams, and the phrase following the waves.
Pa Ling's Blown Hair Sword, Commentary, Case 100 BCR
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Examples of Three-in-One in action
Yun Men said, "I don't ask you about before the fifteenth day; try to say something about after the fifteenth day." Yun Men himself answered for everyone, "Every day is a good day."
Yun Men's Every Day is a Good Day, Case 6 BCR
A monk asked Yun Men, "What are the teachings of a whole lifetime?" Yun Men said, "An appropriate statement."
Yun Men's Appropriate Statement, Case 14 BCR
A monk asked Yun Men, "How is it when the tree withers and the leaves fall?" Yun Men said, "Body exposed in the golden wind."
Yun Men's The Body Exposed, The Golden Wind, Case 27 BCR
A monk asked Yun Men, "What is the Pure Body of Reality?" Yun Men said, "A flowering hedge." The monk asked, "What is it like when one goes on in just such a way?" Yun Men said, "A golden-haired lion."
Yun Men's Flowering Hedge, Case 39 BCR
A monk asked Yun Men, "What is every atom samadhi?" Men said, "Food in the bowl, water in the bucket."
Yun Men's Every Atom Samadhi, Case 50 BCR
A monk asked Pa Ling, "What is the Blown Hair Sword? " Pa Ling said, "Each branch of coral supports the moon."
Pa Ling's Blown Hair Sword, Case 100 BCR