﴿ وَعِبَادُ ٱلرَّحْمَٰنِ ٱلَّذِينَ يَمْشُونَ عَلَى ٱلْأَرْضِ هَوْنًۭا وَإِذَا خَاطَبَهُمُ ٱلْجَٰهِلُونَ قَالُوا۟ سَلَٰمًۭا ﴾

“For, [true] servants of the Most Gracious are [only] they who walk gently on earth, and who, whenever the foolish address them, reply with [words of] peace;”

Please check ayah 25:67 for complete tafsir.