﴿ وَلَمَّا جَآءَهُمْ رَسُولٌۭ مِّنْ عِندِ ٱللَّهِ مُصَدِّقٌۭ لِّمَا مَعَهُمْ نَبَذَ فَرِيقٌۭ مِّنَ ٱلَّذِينَ أُوتُوا۟ ٱلْكِتَٰبَ كِتَٰبَ ٱللَّهِ وَرَآءَ ظُهُورِهِمْ كَأَنَّهُمْ لَا يَعْلَمُونَ ﴾

“And [even now,] when there has come unto them an apostle from God, confirming the truth already in their possession, some of those who were granted revelation aforetime cast the divine writ behind their backs as though unaware [of what it says],”

When there came to them a messenger from God namely Muhammad (s) confirming what was with them a party of them who were given the Scripture have cast away the Scripture of God that is the Torah behind their backs that is to say they have not acted according to what it said about belief in the Messenger and otherwise; as though they did not know what is contained in it to the effect that he is a true Prophet or that it is the Book of God.