Allah says: this Qur'an was mentioned and referred to in the previous Scriptures that were left behind by their Prophets who foretold it in ancient times and more recently. Allah took a covenant from them that they would follow it, and the last of them stood and addressed his people with the good news of Ahmad:

[وَإِذْ قَالَ عِيسَى ابْنُ مَرْيَمَ يبَنِى إِسْرَءِيلَ إِنِّى رَسُولُ اللَّهِ إِلَيْكُم مُّصَدِّقاً لِّمَا بَيْنَ يَدَىَّ مِنَ التَّوْرَاةِ وَمُبَشِّراً بِرَسُولٍ يَأْتِى مِن بَعْدِى اسْمُهُ أَحْمَدُ]

(And (remember) when `Isa, son of Maryam, said: "O Children of Israel! I am the Messenger of Allah unto you, confirming the Tawrah before me, and giving glad tidings of a Messenger to come after me, whose name shall be Ahmad.) (61:6) Zubur here refers to Books; Zubur is the plural of Az-Zabur, which is also the name used to refer to the Book given to Dawud. Allah says:

[وَكُلُّ شَىْءٍ فَعَلُوهُ فِى الزُّبُرِ ]

(And everything they have done is noted in the Az-Zubur.) (54:52), meaning, it is recorded against them in the books of the angels. Then Allah says:

[أَوَلَمْيَكُن لَّهُمْ ءَايَةً أَن يَعْلَمَهُ عُلَمَاءُ بَنِى إِسْرَءِيلَ]

(Is it not a sign to them that the learned scholars of the Children of Israel knew it) meaning, is it not sufficient witness to the truth for them that the scholars of the Children of Israel found this Qur'an mentioned in the Scriptures which they study The meaning is: the fair-minded among them admitted that the attributes of Muhammad and his mission and his Ummah were mentioned in their Books, as was stated by those among them who believed, such as `Abdullah bin Salam, Salman Al-Farisi and others who met the Prophet . Allah said:

[الَّذِينَ يَتَّبِعُونَ الرَّسُولَ النَّبِىَّ الأُمِّىَّ]

(Those who follow the Messenger, the Prophet who can neither read nor write ...) (7:157)