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."
Uthmani script · Saheeh International · Quran 31:19