from his fathers (AS) the conversation of John with the devil: 'John (AS) asked, 'Have you ever been triumphant over me for any moment?' He [the devil] said, 'No, but you have a feature that pleases me.' John asked, 'And what is that?' He said, 'You are a person who eats too much, so when you break your fast and fill yourself, it prevents you from performing some of your prayers and night vigils.' John (AS) said, 'Therefore I will make a pledge to Allah that I will never fill myself with food until I meet Him.' Satan said to him, 'I will make a pledge to Allah that I will never advise a submitter [muslim] again until I meet Him.' So he left and never returned to him after that.'