Prophet Hud - 11:17 Those who had before the Book of Moses as a guide and a mercy, but now have a clear proof from a witness from their Lord, they believe in it. Whichever group disbelieves in it, its place is the Fire. Have no doubt about it. It is a truth from your Lord. But the majority of the people do not believe.
The leading and merciful character of the Book of Moses:
The Night Journey/17:2 "In the same way, We gave Moses the Book. to guide the Children of Israel to the truth: "Do not take any other guardian besides Me."
وَاٰتَيْنَا مُوسَى الْكِتَابَ وَجَعَلْنَاهُ هُدًى لِبَن۪ٓي اِسْرَٓائ۪لَ اَلَّا تَتَّخِذُوا مِنْ دُون۪ي وَك۪يلاًۜ

The Cattle/6:154 Indeed, We gave Moses the Book, complete in the best form, a detailed explanation of everything, guidance and mercy, so that they may believe in the meeting with their Lord.
ثُمَّ اٰتَيْنَا مُوسَى الْكِتَابَ تَمَاماً عَلَى الَّـذ۪ٓي اَحْسَنَ وَتَفْص۪يلاً لِكُلِّ شَيْءٍ وَهُدًى وَرَحْمَةً لَعَلَّهُمْ بِلِقَٓاءِ رَبِّهِمْ يُؤْمِنُونَ۟

The Heights/7:145 "We wrote on tablets for Moses a detailed explanation of all things and an admonition: "Hold fast to this teaching, and tell your people to hold fast to it in the best way. I will show you the final destination of the wayward."
وَكَتَبْنَا لَهُ فِي الْاَلْوَاحِ مِنْ كُلِّ شَيْءٍ مَوْعِظَةً وَتَفْص۪يلاً لِكُلِّ شَيْءٍۚ فَخُذْهَا بِقُوَّةٍ وَأْمُرْ قَوْمَكَ يَأْخُذُوا بِاَحْسَنِهَاۜ سَاُر۪يكُمْ دَارَ الْفَاسِق۪ينَ

The Believers/23:49 We gave Moses the Book that they might find the truth.
وَلَقَدْ اٰتَيْنَا مُوسَى الْكِتَابَ لَعَلَّهُمْ يَهْتَدُونَ

The Sandhills/46:12 Before that the Book of Moses was a guide and a mercy. This is a confirming Book sent down in Arabic to warn the wrongdoers and as good tidings to those who do good.
وَمِنْ قَبْلِه۪ كِتَابُ مُوسٰٓى اِمَاماً وَرَحْمَةًۜ وَهٰذَا كِتَابٌ مُصَدِّقٌ لِسَاناً عَرَبِياًّ لِيُنْذِرَ الَّذ۪ينَ ظَلَمُواۗ وَبُشْرٰى لِلْمُحْسِن۪ينَ