Moderate Voice

وَاقْصِدْ فِي مَشْيِكَ وَاغْضُضْ مِن صَوْتِكَ إِنَّ أَنكَرَ الْأَصْوَاتِ لَصَوْتُ الْحَمِير

Be moderate in your tread and lower your voice. The most hateful of voices is the donkey´s bray. 31:19