Luqman · Ayah 19
وَٱقْصِدْ فِى مَشْيِكَ وَٱغْضُضْ مِن صَوْتِكَ إِنَّ أَنكَرَ ٱلْأَصْوَٰتِ لَصَوْتُ ٱلْحَمِيرِ
And be moderate in your pace and lower your voice; indeed, the most disagreeable of sounds is the voice of donkeys."
Quran 31:19 (Luqman) · Saheeh International, Noor International Center (QuranEnc v1.1.2)