It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "There is no Muslim but that a sin befalls him from time to time. Indeed, the believer is forgetful; when he is reminded, he remembers."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12404