وَٱقْصِدْ فِى مَشْيِكَ وَٱغْضُضْ مِن صَوْتِكَ ۚ إِنَّ أَنكَرَ ٱلْأَصْوَٰتِ لَصَوْتُ ٱلْحَمِيرِ
How to read it
Wa -q'ṣid' fī mash'yika wa-gh'ḍuḍ' min ṣaw'tika . 'inna 'ankara l-'aṣ'wāti laṣaw'tu l-ḥamīri
"And be moderate in thy pace, and lower thy voice; for the harshest of sounds without doubt is the braying of the ass."
Translation: Abdullah Yusuf Ali

