He reported God's messenger as saying, "When the inhabitants of paradise enter paradise and the inhabitants of hell enter hell God most high will say, `Bring forth those in whose hearts there is as much faith as a grain of mustard-seed.' They will then be brought forth burned and turned to charcoal and be cast into the river of life, and they will sprout as does a seed in the rubbish carried away by a flood. Have you not seen that it comes out yellow and twisted?"
(Bukhari and Muslim.)