Sayyiduna al-Agharr al-Muzani (may Allah be pleased with him), who was a Companion of the Prophet (peace and blessings be upon him), said that the Messenger of Allah (peace and blessings be upon him) said: "Indeed a state comes over my heart, and I seek the forgiveness of Allah a hundred times every day."
Hadith Referenceالمعجم الكبير للطبراني / باب الألف / 884