لُقْمَانَ · 19

وَٱقۡصِدۡ فِي مَشۡيِكَ وَٱغۡضُضۡ مِن صَوۡتِكَۚ إِنَّ أَنكَرَ ٱلۡأَصۡوَٰتِ لَصَوۡتُ ٱلۡحَمِيرِ

And be moderate in thy pace, and lower thy voice; for the harshest of sounds without doubt is the braying of the ass