7:40
إِنَّ الَّذِينَ كَذَّبُوا بِآيَاتِنَا وَاسْتَكْبَرُوا عَنْهَا لاَ تُفَتَّحُ لَهُمْ أَبْوَابُ السَّمَاءِ وَلاَ يَدْخُلُونَ الْجَنَّةَ حَتَّى يَلِجَ الْجَمَلُ فِي سَمِّ الْخِيَاطِ وَكَذَلِكَ نَجْزِي الْمُجْرِمِينَ
'Inna Al-Ladhīna Kadhdhabū Bi'āyātinā Wa Astakbarū `Anhā Lā Tufattaĥu Lahum 'Abwābu As-Samā'i Wa Lā Yadkhulūna Al-Jannata Ĥattá Yalija Al-Jamalu Fī Sammi Al-Khiyāţi Wa Kadhalika Najzī Al-Mujrimīna 

Those who have denied Our revelations, and became arrogant towards them, the gates of the heavens will not open for them, nor will they enter the Paradise until the camel passes through the eye of a needle. It is such that We recompense the criminals.

77:33
كَأَنَّه ُُ جِمَالَة ٌ صُفْر ٌ
Ka'annahu Jimālatun Şufrun 

As if they were yellow camels.