نَزَّلَ عَلَيْكَ الْكِتَابَ بِالْحَقِّ مُصَدِّقًا لِمَا بَيْنَ يَدَيْهِ وَأَنْزَلَ التَّوْرَاةَ وَالْإِنْجِيلَ {3}
[Shakir 3:3] He has revealed to you the Book with truth, verifying that which is before it, and He revealed the Tavrat and the Injeel aforetime, a guidance for the people, and He sent the Furqan.
[Pooya/Ali Commentary 3:3]
Aqa Mahdi Puya says:
Tawrat, Injil and the books, mentioned here and in other verses of the Quran, refer to that which was revealed to Musa, Isa and other prophets. Tawrat (the revealed will of Allah) was revealed to Musa. In Hebrew it means light. But the Old Testament is a collection of several other books in addition to the Pentateuch. The four gospels of the New Testament are not the Injil revealed to prophet Isa. These gospels contain only some extracts of the sayings of Isa, and narrate his activities in Galilee, Jerusalem and other habitations of the Jews. The Christian Bible is a book of traditions like the books of traditions written by Muslim, Bukhari and other writers of traditions. These four gospels were written by the followers of Jesus, whom the Christian church proclaims as the apostles. In fact the teaching of Jesus is the gospel, which means glad tidings or good news, because the advent of the last prophet of Allah,
the Holy Prophet, was foretold by him, as mentioned in John 14: 16, 17; and 15: 26; and 16: 7 to 13 (see commentary of verse 40 of al Baqarah). The Old and the New Testaments, known as the Bible, is an edited edition of the corrupted and distorted Jewish scripts, prepared to give currency to the doctrine of trinity.
It is mentioned in Mark 1: 15 that Jesus asked his disciples to believe in the gospel and preach it to the children of Israel. The gospel referred to by Isa was the Injil, original text of which is not available. On account of theological considerations adhered to by the first council of Venice, the four gospels, written by Matthew, Mark, Luke and John; are said to be authentic, otherwise there is no historical evidence to support this claim. There were other gospels written by some other disciples but they are treated as apocryphal (spurious) and non-canonic.
The Quran is the only uncorrupted book of Allah, containing the true word of Allah in its original purity, revealed to the Holy Prophet, who pronounced it as it was revealed to him, recorded then and there, preserved, never tampered with, and transferred to generation after generation.
Falsehood cannot come near it from before it nor from behind it. (It is) a revelation from the all-wise, the most praised. (Ha Mim: 42)
For kitab see commentary of verse 2 of al Baqarah.
Bil haqq means (with) truth, certainty, reason, justice and proof, in contrast to the false notions and fabricated dogmas of the other corrupted religions and creeds.
Musaddiqan means the Quran verifies and confirms the preachings of the earlier prophets about the unity of Allah and His demand from man to do good and adopt righteousness.
Furqan means that which teaches us to distinguish between good and evil, truth and falsehood. It also means salvation. It is another name of the Quran.