The narrator relates: I was sitting with Sulayman bin Surad and Khalid bin Urfutah (may Allah be pleased with them both) when news reached them that a man had died of a stomach illness. One of them said to the other: Did you not hear the Messenger of Allah (peace and blessings be upon him) say: "Whoever is killed by his belly will not be punished in his grave"? He said: Certainly.
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 4089