Case:

A monk asked Hyakujô, "What is a matter of extraordinary wonder?" Hyakujô said, "Sitting alone on Daiyû Peak." The monk made a deep bow. Hyakujô thereupon hit him.

Verse:

In the realm of the patriarch, the heavenly colt gallops freely.

The way he rolls up and unrolls in instructing people is not ordinary indeed.

In the flash of lightning, in the spark from flint lies an outstanding activity.

How interesting!

The man is come to stroke the tiger's whiskers.

Notes:

Daiyû: the name of the mountain, where Hyakujo's monastery was located.

This is one of the twenty-one Cases in the Hekiganroku that are not supplied with an Instruction.

Links:

Introductory post to Hekiganroku

List of posted koans.

Extended commentary on verse, case and introduction.