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]. (ES)
App reference (ES): Book 20, Hadith 2 (ES)
Arabic/English book reference (ES): Book 20, Hadith 1870 (ES)