In one narration the words are: The Prophet (peace and blessings be upon him) came out to his Companions, and joy was showing on his blessed face, and the people recognised the joy on his face. After this the narrator mentioned the hadith as before. In one narration he transmitted these words (the Lord said): "O Muhammad, when you have prayed, say this." And in this narration the words are: "And the ranks are fasting and speaking good words."
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب التعبير / 11740