Mishkat al-Masabih 2187

Abu Huraira reported God’s messenger as saying, “God Most High has ninety-nine names. He who retains them in his memory will enter paradise. He is God than whom there is no god, the Compassionate, the Merciful, the King, the Holy, the Source of Peace, the Preserver of security, the Protector, the Mighty, the Overpowering, the Great in Majesty, the Creator, the Maker, the Fashioner, the Forgiver, the Dominant, the Bestower, the Provider, the Decider, the Knower, the Withholder, the Plentiful Giver, the Abaser, the Exalter, the Honourer, the Humiliator, the Hearer, the Seer, the Judge, the Just, the Gracious, the Informed, the Clement, the Incomparably Great, the Forgiving, the Rewarder, the Most High, the Most Great, the Preserver, the Sustainer, the Reckoner, the Majestic, the Generous, the Watcher, the Answerer, the Liberal, the Wise, the Loving, the Glorious, the Raiser, the Witness, the Real, the Trustee, the Strong, the Firm, the Patron, the Praiseworthy, the All-Knowing, the Originator, the Restorer to life, the Giver of life, the Giver of death, the Living, the Eternal, the Self-sufficient, the Grand, the One, the Single, He to whom men repair, the Powerful, the Prevailing, the Advancer, the Delayer, the First, the Last, the Outward, the Inward, the Governor, the Sublime, the Amply Beneficent, the Accepter of Repentance, the Avenger, the Pardoner, the Kindly, the Ruler of the Kingdom, the Lord of Majesty and Splendour, the Equitable, the Gatherer, the Independent, the Enricher, the Depriver, the Harmer, the Benefiter, the Light, the Guide, the First Cause*, the Enduring, the Inheritor, the Director, the Patient.”
*Or, 'the Incomparable' (al-badi').

Tirmidhi and Baihaqi, in ad-Da'awat al-kabir, transmitted it, Tirmidhi saying this a gharib tradition.