Sahih Muslim Book 4, Hadith Number 1227.

Chapter : Desirability of seeking refuge from the torment of the grave.

‘Aisha reported: When the Messenger of Allah (may peace be upon him) pronounced salutation, he salutation longer than it took him to say: O Allah: Thou art Peace, and peace comes from Thee, blessed art Thou, Possessor of Glory and ]Honour; and in the narration of Ibn Numair the words are: “O Possessor of Glory and Honour.”