Abu Dawud Book 2, Hadith Number 1502.
Chapter : What a man should recite after giving the salutations in prayer.
Narated By Abu al-Zubair : ‘Abd Allah b. al-Zubair used to recite this supplication after each (prescribed) prayer. He then narrated a similar supplication and added to it: “There is no might and no power except in Allah; there is no god but Allah Whom we alone worship. To Him belongs wealth.” The narrator then transmitted the rest of the tradition.