In one narration the words are: "Part of the excellence of a person's Islam is that he speaks little about what does not concern him."
Ahmad recorded it, and al-Tabarani recorded the first version in all three of his books; the narrators of Ahmad and of al-Mu'jam al-Kabir are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأدب / 12637
Hadith Gradingمحدثین:إسنادہ صحیح
Hadith Takhrij«اخرجه الطبراني فى المعجم الكبير (1732)»