Abu Hurairah (May Allah be pleased with him) said:
I heard the Messenger of Allah (ﷺ) saying, "I swear by Allah that I seek Allah's Pardon and turn to Him in repentance more than seventy times a day."[Al-Bukhari].
App reference: Book 20, Hadith 2
Arabic/English book reference: Book 20, Hadith 1870