Sahih Muslim Book 4, Hadith Number 1238.

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

Abu Zubair al-Makki reported that he had heard ‘Abdullah b. Zubair uttering (the words) like that of the Hadith (narrated above) at the end of the prayer after pronouncing salutation. He at the conclusion also said that he was making a mention of that from the Messenger of Allah (may peace be upon him).