It was narrated that Ibn Umar said: "We used to count that the Messenger of Allah( ﷺ saw) said one hundred times in a gathering: Rabbighfirli wa tub alayya innaka Antat- Tawwabur Rahim (O Allah forgive me and accept my repentance, for You are the Accepter of repentance, the Most Merciful}." (Sahih)