Al-Mukhtasar
وَٱقْصِدْ فِى مَشْيِكَ وَٱغْضُضْ مِن صَوْتِكَ ۚ إِنَّ أَنكَرَ ٱلْأَصْوَٰتِ لَصَوْتُ ٱلْحَمِيرِ ﴿١٩﴾
Be moderate in your manner of walking: between hastiness and lethargy, displaying dignity. And lower your voice; do not raise it such that it causes inconvenience. Indeed, the most hideous of sounds is that of the donkey because of them being loud.