Shoyoroku - Case 9: Nansen Kills a Cat [1]

Once the monks of the eastern and western Zen halls in Nansen's temple were
quarrelling about a cat. As he saw this, Nansen held up the cat and said,
  "You monks! If one of you can say a word, I will not slay the cat."
No one could answer. Nansen cut the cat in two. Nansen told Joshu what had
happened, and asked him for his view. Joshu thereupon took his sandals, put
them upon his head and went away. Nansen said,
  "If you had been there, I could have spared the cat."

[1]: see case 14 of Mumonkan and cases 63 and 64 of Hekiganroku.