Luqman (31:19)
وَٱقۡصِدۡ فِی مَشۡیِكَ وَٱغۡضُضۡ مِن صَوۡتِكَۚ إِنَّ أَنكَرَ ٱلۡأَصۡوَ ٰتِ لَصَوۡتُ ٱلۡحَمِیرِ
Be modest in thy bearing and subdue thy voice. Lo! the harshest of all voices is the voice of the ass.
— Mohammed Marmaduke William Pickthall
Waqsid fee mashyika waghdud min sawtik; inna ankaral aswaati lasawtul hameer