Abdullah bin Yasar al-Juhani (may Allah have mercy on him) relates: We had someone who had died, so we hastened (his burial). Then I came to the mosque and met Khalid bin Urfutah and Sulayman bin Surad (may Allah be pleased with them both), and they said: Why did you not inform us of him? I said: He was suffering from a stomach illness. They both said: We heard the Messenger of Allah (peace and blessings be upon him) say: "The one with a stomach illness is not punished in his grave."
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 4093