A grotto, probably near Rājagaha. On one occasion Sāriputta, having recently shaved his head, was seated there wrapt in samādhi, and a yakkha, passing overhead with his friend to an assembly of yakkhas, yielded, despite the warning of his friend, to the temptation to give a knock on the monk’s shining head. The yakkha immediately fell down and was swallowed up in the fires of hell. Sāriputta had but a slight headache after the blow, which was, it is said, heavy enough to crush an elephant. Ud.39f.