Sahih Muslim | Book 35 | Hadith Number 6523

Narrated by Al-Agharr al-Muzani
Al-Agharr al-Muzani who was from amongst the Companions of Allah's Apostle (may peace be upon him) reported that Ibn 'Umar stated to him that Allah's Messenger (may peace 'be upon him) said: O people, seek repentance from Allah. Verily, I seek repentance from Him a hundred times a day.