Sunan Abi Dawud 1507
سنن أبي داود#1507SahihAbu al-Zubair said:'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 alone we worship. To Him belongs wealth." The narrator then transmitted the rest of tradition
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih
In-book reference: 8:92