A guru is travelling and stops at a little island where 3 monks are living. When he passes by he hears that they recite a mantra totally wrong. He stops and teaches the monks the correct mantra. The monks thank him exuberantly.
Soon the guru went on with his trip. The ship was already on the sea, when he heard loud voices coming from the shore. He turned around and saw how the monks were walking on the water towards the ship: They shouted: "Guru, wait! We've forgotten the mantra!".
Freely translated by me: Out of the book: Da lacht der Erleuchtete by Eli Jaxon-Bear and Sabrina Lorenz.