Pickthall

Luqman · 31:19

وَاقْصِدْ فِي مَشْيِكَ وَاغْضُضْ مِنْ صَوْتِكَ ۚ إِنَّ أَنْكَرَ الْأَصْوَاتِ لَصَوْتُ الْحَمِيرِ

Be modest in thy bearing and subdue thy voice. Lo! the harshest of all voices is the voice of the ass.