Allah SWT says: إِنَّ شَرَّ الدَّوَآبِّ عِنْدَ اللَّهِ الَّذِينَ كَفَرُوا فَهُمْ لَا يُؤْمِنُونَ "Indeed, the worst of living creatures in the sight of Allah are those who have disbelieved, and they will not [ever] believe -" (QS. Al-Anfaal: Verse 55) * Via the Beautiful Qur'an http://goo.gl/QLwc8B