Al-Anfaal (8:55)
إِنَّ شَرَّ ٱلدَّوَاۤبِّ عِندَ ٱللَّهِ ٱلَّذِینَ كَفَرُوا۟ فَهُمۡ لَا یُؤۡمِنُونَ
Lo! the worst of beasts in Allah's sight are the ungrateful who will not believe.
— Mohammed Marmaduke William Pickthall
Inna sharrad dawaaabbi 'indal laahil lazeena kafaroo fahum laa yu'minoon