A disciple was taught by Muhammad a practice by which he experienced ecstasy. After some days he came bringing fruit and flowers which he offered to the Prophet, thanking him greatly and saying, 'The lesson that you taught me has been of such great value to me; it has brought me such joy. My prayers, which used to last a few minutes, now last all day.' Muhammad said, 'I am glad that you liked the lesson, but please, from today, stop the practice!'