All the Holy Books available in the world are the Quran. Who testify to one God. And each book establishes the constitution according to its era and establishes the standard of living. These texts are inscribed in the original book (Loh e Mahfuz) near God. [Q-13:38-39]. These texts define humans and demons.
The differences that arose in the texts before the Qur’an were because human beings changed the script of God for their own benefit. The Qur’an is the source of this incompleteness of these texts and the restoration of the destroyed script.
رَّبِّ اَعُوۡذُ بِکَ مِنۡ ھَمَزٰتِ الشَّیٰطِیۡنِ ۙ وَ اَعُوۡذُ بِکَ رَبِّ اَنۡ یَّحۡضُرُوۡن ؕ ۔
بِسۡمِ اللّٰهِ الرَّحۡمٰنِ الرَّحِيۡمِۙ۔
Believer’s belief in Holy books and reward and punishment.
لٰـكِنِ الرّٰسِخُوۡنَ فِى الۡعِلۡمِ مِنۡهُمۡ وَالۡمُؤۡمِنُوۡنَ يُـؤۡمِنُوۡنَ بِمَاۤ اُنۡزِلَ اِلَيۡكَ وَمَاۤ اُنۡزِلَ مِنۡ قَبۡلِكَ وَالۡمُقِيۡمِيۡنَ الصَّلٰوةَ وَالۡمُؤۡتُوۡنَ الزَّكٰوةَ وَ الۡمُؤۡمِنُوۡنَ بِاللّٰهِ وَالۡيَوۡمِ الۡاٰخِرِ ؕ اُولٰٓٮِٕكَ سَنُؤۡتِيۡهِمۡ اَجۡرًا عَظِيۡمًا ﴿۱۶۲﴾۔
But those firm in knowledge among them and the believers believe in [Quran] what has been revealed to you [O Muhammad], and also in the books that were revealed before you and the establishers of prayer [especially] and the givers of zakah and the believers in Allah and the Last Day – those We will give a great reward.
يٰۤاَيُّهَا الَّذِيۡنَ اٰمَنُوۡۤا اٰمِنُوۡا بِاللّٰهِ وَرَسُوۡلِهٖ وَالۡكِتٰبِ الَّذِىۡ نَزَّلَ عَلٰى رَسُوۡلِهٖ وَالۡكِتٰبِ الَّذِىۡۤ اَنۡزَلَ مِنۡ قَبۡلُؕ وَمَنۡ يَّكۡفُرۡ بِاللّٰهِ وَمَلٰٓٮِٕكَتِهٖ وَكُتُبِهٖ وَرُسُلِهٖ وَالۡيَوۡمِ الۡاٰخِرِ فَقَدۡ ضَلَّ ضَلٰلًاۢ بَعِيۡدًا ﴿۱۳۶﴾۔
[Q-04:136]
O you who believe! Believe in Allah, and His Messenger (Muhammad ﷺ), and the Holy Book (the Qur’an) which He has sent down to His Messenger, and the Scripture which He sent down to those before (him), and whosoever disbelieves in Allah, His Angels, His Books, His Messengers, and the Last Day, then indeed he has strayed far away. 136.
وَلَقَدۡ اٰتَيۡنَا مُوۡسَى الۡكِتٰبَ فَاخۡتُلِفَ فِيۡهِؕ وَلَوۡلَا كَلِمَةٌ سَبَقَتۡ مِنۡ رَّبِّكَ لَـقُضِىَ بَيۡنَهُمۡؕ وَاِنَّهُمۡ لَفِىۡ شَكٍّ مِّنۡهُ مُرِيۡبٍ ﴿۴۵﴾۔
[Q-41:45]
And We had already given Moses the Scripture, but it came under disagreement. And if not for a word that preceded from your Lord, it would have been concluded between them. And indeed, they are, concerning the Qur’an, in disquieting doubt.
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All the Holy books are Criterion, Light and Guidance.
وَلَـقَدۡ اٰتَيۡنَا مُوۡسٰى وَهٰرُوۡنَ الۡفُرۡقَانَ وَضِيَآءً وَّذِكۡرًا لِّـلۡمُتَّقِيۡنَۙ ﴿۴۸﴾ الَّذِيۡنَ يَخۡشَوۡنَ رَبَّهُمۡ بِالۡغَيۡبِ وَهُمۡ مِّنَ السَّاعَةِ مُشۡفِقُوۡنَ ﴿۴۹﴾ وَهٰذَا ذِكۡرٌ مُّبٰرَكٌ اَنۡزَلۡنٰهُؕ اَفَاَنۡتُمۡ لَهٗ مُنۡكِرُوۡنَ ﴿۵۰﴾۔
[Q-21:48-50]
And We had already given Musa and Haroon the criterion and a light and a reminder for the righteous. (48). Who fear their Lord unseen, while they are of the Hour apprehensive. (49) And this [Qur’an] is a blessed message which We have sent down. Then are you with it unacquainted? (50)
وَلَقَدۡ اٰتَيۡنَا مُوۡسَى الۡكِتٰبَ فَلَا تَكُنۡ فِىۡ مِرۡيَةٍ مِّنۡ لِّقَآٮِٕهٖ وَجَعَلۡنٰهُ هُدًى لِّبَنِىۡۤ اِسۡرَآءِيۡلَۚ ﴿۲۳﴾۔
[Q-32:23]
And We certainly gave Moses the Scripture, so do not be in doubt over his meeting. And we made the Torah guidance for the Children of Israel.23”
وَلَقَدۡ اٰتَيۡنَا مُوۡسَى الۡهُدٰى وَاَوۡرَثۡنَا بَنِىۡۤ اِسۡرَآءِيۡلَ الۡكِتٰبَۙ ﴿۵۳﴾ هُدًى وَّذِكۡرٰى لِاُولِى الۡاَلۡبَابِ ﴿۵۴﴾۔
[Q-40:53-54]
And We had certainly given Moses’s guidance, and We caused the Children of Israel to inherit the Scripture. 53” As guidance and a reminder for those of understanding.54”
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The Quran confirms the Holy books revealed in the past.
وَهٰذَا كِتٰبٌ اَنۡزَلۡنٰهُ مُبٰرَكٌ مُّصَدِّقُ الَّذِىۡ بَيۡنَ يَدَيۡهِ وَلِتُنۡذِرَ اُمَّ الۡقُرٰى وَمَنۡ حَوۡلَهَا ؕ وَالَّذِيۡنَ يُؤۡمِنُوۡنَ بِالۡاٰخِرَةِ يُؤۡمِنُوۡنَ بِهٖ وَهُمۡ عَلٰى صَلَاتِهِمۡ يُحَافِظُوۡنَ ﴿۹۲﴾۔
[Q-06:92]
And this (the Qur’an) is a blessed Book which We have sent down, confirming (the revelations) which came before it, so that you may warn the mother of Towns (i.e., Makkah) and all those around it. Those who believe in the Hereafter believe in (the Qur’an), and they are constant in guarding their Salat (prayers). 92.
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وَاَنۡزَلۡنَاۤ اِلَيۡكَ الۡكِتٰبَ بِالۡحَـقِّ مُصَدِّقًا لِّمَا بَيۡنَ يَدَيۡهِ مِنَ الۡكِتٰبِ ﴿۴۸﴾۔
[Q-5:48]
And We have revealed to you, [O Muúammad], the Book in truth, confirming that which preceded it of the Scripture.48”
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The Holy books are the words and laws of God.
بِالۡبَيِّنٰتِ وَالزُّبُرِؕ وَاَنۡزَلۡنَاۤ اِلَيۡكَ الذِّكۡرَ لِتُبَيِّنَ لِلنَّاسِ مَا نُزِّلَ اِلَيۡهِمۡ وَلَعَلَّهُمۡ يَتَفَكَّرُوۡنَ ﴿۴۴﴾۔
[Q-16:44]
With clear signs and Books (We sent the Messengers). And We have also sent down unto you (O Muhammad ﷺ) the reminder and the advice (the Qur’an), that you may explain clearly to men what is sent down to them, and that they may give thought. 44.
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The Quran is the lens of reading the former Holy books.
اِنَّ هٰذَا الۡقُرۡاٰنَ يَقُصُّ عَلٰى بَنِىۡۤ اِسۡرَآءِيۡلَ اَكۡثَرَ الَّذِىۡ هُمۡ فِيۡهِ يَخۡتَلِفُوۡنَ ﴿۷۶﴾ وَاِنَّهٗ لَهُدًى وَّرَحۡمَةٌ لِّلۡمُؤۡمِنِيۡنَ ﴿۷۷﴾۔
[Q-27:76-77]
Indeed, this Qur’an relates to the Children of Israel most of that over which they disagree. 76” And indeed, it is guidance and mercy for the believers.77”
وَاَنۡزَلۡنَاۤ اِلَيۡكَ الۡكِتٰبَ بِالۡحَـقِّ مُصَدِّقًا لِّمَا بَيۡنَ يَدَيۡهِ مِنَ الۡكِتٰبِ وَمُهَيۡمِنًا عَلَيۡهِ فَاحۡكُمۡ بَيۡنَهُمۡ بِمَاۤ اَنۡزَلَ اللّٰهُ ﴿۴۸﴾۔
[Q-5:48]
And We have revealed to you, [O Muúammad], the Book in truth, confirming that which preceded it of the Scripture and as a criterion over it. So, judge between them by what Allah has revealed.48”