Surah Al-Anfal — Ayah 22 (8:22)
۞ إِنَّ شَرَّ ٱلدَّوَآبِّ عِندَ ٱللَّهِ ٱلصُّمُّ ٱلۡبُكۡمُ ٱلَّذِينَ لَا يَعۡقِلُونَ ٢٢
English translation (Saheeh International)
Indeed, the worst of living creatures in the sight of Allāh are the deaf and dumb who do not use reason [i.e., the disbelievers].
Brief commentary
The worst of creatures on the face of the earth in the sight of Allah are those who are deaf to the truth, not listening to it and accepting it; and dumb, not acknowledging the truth or calling to it, because they do not understand what Allah instructs or forbids.