Surah Al-Furqan (The Criterion), Verse 63

وَعِبَادُ الرَّحْمٰنِ الَّذِیْنَ یَمْشُوْنَ عَلَی الْاَرْضِ هَوْنًا وَّاِذَا خَاطَبَهُمُ الْجٰهِلُوْنَ قَالُوْا سَلٰمًا ۟

Wa 'ibaadur Rahmaanil lazeena yamshoona 'alal ardi hawnanw wa izaa khaata bahumul jaahiloona qaaloo salaamaa

“And the servants of (Allah) Most Gracious are those who walk on the earth in humility, and when the ignorant address them, they say, "Peace!";”

Quran 25:63 (Yusuf Ali Translation)