One of them used to backbite people.

One of them used to backbite people. The other was too careless to cleanse himself after urinating.’ He (ص) called for a fresh palm leaf or two which he broke, planting one on each grave. He (ص) said, ‘This will lighten their torment as long as they are not dry’” ( Tanbīh al-Khawātir , Vol. 1, p. 116). Anas has said, “The Messenger of Allāh (ص) ordered people once to fast then said, ‘Nobody should break his fast till I give him permission.’ People fasted.