﴿ إِنَّ شَرَّ ٱلدَّوَآبِّ عِندَ ٱللَّهِ ٱلَّذِينَ كَفَرُوا۟ فَهُمْ لَا يُؤْمِنُونَ ﴾

“Verily, the vilest creatures in the sight of God are those who are bent on denying the truth and therefore do not believe.”

(Lo! the worst of beasts) of created beings (in Allah's sight are the ungrateful) Banu Qurayzah and others (who will not believe) in Muhammad (pbuh) and in the Qur'an;