Hadith 518100
Chapter 56: Speech - كتاب الكلام
وَحَدَّثَنِي مَالِكٌ، أَنَّهُ بَلَغَهُ أَنَّهُ قِيلَ لِلُقْمَانَ مَا بَلَغَ بِكَ مَا نَرَى يُرِيدُونَ الْفَضْلَ . فَقَالَ لُقْمَانُ صِدْقُ الْحَدِيثِ وَأَدَاءُ الأَمَانَةِ وَتَرْكُ مَا لاَ يَعْنِينِي .
Malik related to me that he heard that someone said to Luqman, "What has brought you to what we see?" meaning his high rank. Luqman said, "Truthful speech, fulfilling the trust, and leaving what does not concern me."
Reference Muwatta Malik 518100
USC-MSA web (English) reference : Book 56, Hadith 17