《太平广记·卷三百零七·神十七》
第二天仲殷如约来到时，老人也来了，就领着仲殷往西走了四五里，走进一个山口，路渐渐低下去，好象走进一个洞里。
仲殷益异之。如是三度，仲殷乃拜乞射法。
The next day, Zhong Yin came as agreed, and the old man came, too. He led Zhong Yin west for four or five miles and entered a valley. The road gradually became lower, as if they were entering a cave.