Sa'd bin 'Ubaida al-Salmi سعد بن عبيدة السلمي أبو حمزة · The Book of Funerals

"I was sitting with sulaiman bin Sard and Khalid bin 'Urfutah, and they said that a man had died as a result of abdominal illness. They wanted to attend his funeral, and one of them said to the other: 'Didn't the Messenger of Allah say: Whoever is killed by an abdominal illness, he will not be punished in his grave? The other said: 'Yes.'''