Warrad reported,

Mughira bin Shuba wrote to Muawiya, and it was Warrad who wrote that letter for him, saying, "I heard the Messenger of Allah ﷺ when he finished the prayer and gave the closing salutation, he would say, 'There is no god but Allah, alone, with no partner. His is the dominion and His is the praise, and He has power over all things. O Allah, no one can withhold what You have given, and no one can give what You have withheld, and the fortune of a fortunate man avails him nothing against You.'"

Muslim 1340

Sahih

و حدثني محمد بن حاتم حدثنا محمد بن بكر أخبرنا ابن جريج أخبرني عبدة بن أبي لبابة أن ورادا مولى المغيرة بن شعبة قال كتب المغيرة بن شعبة إلى معاوية كتب ذلك الكتاب له وراد إني سمعت رسول الله ﷺ يقول حين سلم بمثل حديثهما إلا قوله وهو على كل شيء قدير فإنه لم يذكر

مسلم 1340صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Mosques and places of prayer
Chapter
Recommendation of remembrance after prayer and description of its manner
Numbering
Darussalam 1340
Muslim 1340