Mughira gave me dictation of it and 1 wrote it to Mu'awiya.
Sahih Muslim Book 5, Hadith 176
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When the Messenger of Allah (ﷺ) finished the prayer and pronounced salutation he uttered (this supplication):" There is no god but Allah. He is alone, Who has no partner. To Him belongs the sovereignty and to Him praise is due and He is Potent over every. thing. O Allah! no one can withhold what Thou givest, or give what Thou withholdest, and the riches cannot avail a wealthy person with Thee."
Sahih Muslim Book 5, Hadith 175 Next Hadith → Mughira b. Shu'ba wrote to Mu'awiya (it was Warrad who wrote this letter for him, i. e. Mughira): I heard the Messenger of Allah (ﷺ) saying:" When the salutation is pronounced." and the rest of the hadith is the same except this that he made no mention of:" He is Potent over everything."
Sahih Muslim Book 5, Hadith 177
Sahih Muslim Book 5, Hadith 175 Next Hadith → Mughira b. Shu'ba wrote to Mu'awiya (it was Warrad who wrote this letter for him, i. e. Mughira): I heard the Messenger of Allah (ﷺ) saying:" When the salutation is pronounced." and the rest of the hadith is the same except this that he made no mention of:" He is Potent over everything."
Sahih Muslim Book 5, Hadith 177