قُلْ يَـٰٓأَهْلَ ٱلْكِتَـٰبِ لَسْتُمْ عَلَىٰ شَىْءٍ حَتَّىٰ تُقِيمُوا۟ ٱلتَّوْرَىٰةَ وَٱلْإِنجِيلَ وَمَآ أُنزِلَ إِلَيْكُم مِّن رَّبِّكُمْ ۗ وَلَيَزِيدَنَّ كَثِيرًا مِّنْهُم مَّآ أُنزِلَ إِلَيْكَ مِن رَّبِّكَ طُغْيَـٰنًا وَكُفْرًا ۖ فَلَا تَأْسَ عَلَى ٱلْقَوْمِ ٱلْكَـٰفِرِينَ Qur’an Al-Ma'ida (5:68)Qul ya ahla alkitabi lastum AAala shayin hatta tuqeemoo alttawrata waalinjeela wama onzila ilaykum min rabbikum walayazeedanna katheeran minhum ma onzila ilayka min rabbika tughyanan wakufran fala tasa AAala alqawmi alkafireena
I.e., all the other God-inspired books of the Old Testament which stress the oneness of God and are full of prophecies relating to the advent of the Prophet Muhammad (Razi). This must be understood in conjunction with the oft-repeated Qur'anic statement that the Bible, as it exists now, has undergone many textual changes and corruptions.
In v. 26, Moses was told not to sorrow over a rebellious people. Here Muhammad is told not to sorrow over people without Faith. The second situation is even more trying than the first. Rebellion may be a passing phase. Want of faith is an attitude of mind that is well-nigh hopeless. Yet the Prophet patiently reasoned with them and bore their taunts and insults. If, the argument runs, you do not believe in anything, even in the things that you may be expected to believe in, how can you receive in Faith Allah's Message that has come in another form? In fact your jealousy adds to your obstinacy and unbelief.