Abu Dawud Book 2, Hadith Number 1501.

Chapter : What a man should recite after giving the salutations in prayer.

Narated By Abu al-Zubair : I heard ‘Abd Allah b. al-Zubair saying on the pulpit: When the Prophet (PBUH) finished the prayer, he used to say (at the end of the prayer): “There is no god but Allah, Alone, Who has no partner; to Him belong the Kingdom, to Him praise is due, and He is Omnipotent. There is no god but Allah to Whom we are sincere in devotion, even though the infidels should disapprove. To Him belongs all wealth, to Him belongs grace and to Him is worthy praise accorded. There is no god but Allah to whom we are sincere in devotion, even though the infidels should disapprove.