Abdur-Rahman bin Yazid narrated that:Thawban said: “The Messenger of Allah said: 'Who will commit himself to one thing, I will guarantee him paradise?' I said: 'I will.' He said: 'Do not ask people for anything.' So Thawban would drop his whip while he was on his mount, and he would not say to anyone: 'Get that for me' rather he would dismount and grab it.”

English translation · Sunan Ibn Majah