The Messenger of Allah ﷺ said, "I seek Allah's forgiveness and turn to Him in repentance seventy times each day."
حدثنا علي بن محمد حدثنا وكيع عن مغيرة بن أبي الحر
قال رسول الله ﷺ إني لأستغفر الله وأتوب إليه في اليوم سبعين مرة
Its isnad is hasan. Ahmad narrated it (4/410) from Waki, through this route. Abu Ishaq also narrated it from Abu Burda, through this route, as reported by Ahmad (5/394) and Nasai in Amal al-Yawm wal-Layla.