when a messenger was sent to them by god affirming the books they had already received some of them put behind their backs as if they had no knowledge of it.
ولما جاءهم رسول من عند الله مصدق لما معهم نبذ فريق من الذين أوتوا الكتاب كتاب الله وراء ظهورهم كأنهم لا يعلمون