Sahih Bukhari Volume 008, Book 077, Hadith Number 612.
Narated By Warrad : (The freed slave of Al-Mughira bin Shu'ba) Muawiya wrote to Mughira. 'Write to me what you heard the Prophet saying after his prayer.' So Al-Mughira dictated to me and said, "I heard the Prophet saying after the prayer, 'None has the right to be worshipped but Allah Alone Who has no partner. O Allah! No-one can withhold what You give, and none can give what You withhold, and the fortune of a man of means is useless before You (i.e., only good deeds are of value)."