Thawb an narrated that when he finished his prayer. The Messenger of Allah ﷺ would ask for forgiveness three times. Then he would say: "Allahumma Antas-Salam wa minkas-salam tabarakta ya Dhal·jalali wal-ikram" (O Allah. You are As-Salam and from You is all peace, Blessed are You O Possessor of majesty and honor)." (Sahih)