Invitation unto Quran is actually invitation unto previous Scriptures because teachings of all heavenly Books are the same
Surah ‘Aali ‘Imraan (The Family of Imran - 3), Stage – 1,
Verses – 23 & 24 of 200, Section – 3 of 20, (Part – 3)
In the name of God, the Beneficent, the Merciful
23. Hast thou not seen how those who were given a portion of the Scripture are called to the Scripture of Allah (in their disputes) that it may judge between them; then a faction of them turn away, being opposed (to it).
24. that is because they say: The Fire will not touch us save for a certain number of days. And that which they used to invent hath deceived them regarding their religion.
23. ‘Alam tara ‘ilal-laziina ‘uutuu nasiibam-minal-Kitaabi yud-‘awna ‘ilaa KitaabIllaahi li-yah-kuma baynahum summa yata-wallaa fariiqum-minhum wa hum-mu’-rizuun.
24. Zaalika bi-‘annahum qaaluu lan- tamassa-nan-Naaru ‘illaaa ‘ayyaamam-ma’-duudaat, wa garrahum fii diinihim-maa kaanuu yaftaruun.
It has been described in these verses that when they are invited to come unto Holy Qur’an, which has been revealed according to the mentioned good news in their Holy Scriptures and It has correct decision power of their contradictions and differences. Then some of their religious scholars turn away, whereas invitation unto Holy Qur’an is actually the invitation unto Torah and Gospel.
These people turn away from the guidelines and commands of their own Scripture and make changes in to them in accordance with their desires. Neither they care about the good news; revealed in the Scriptures and nor believe in the predictions mentioned into them.
Then, it was described that the reason of their too much strong desire towards evil deeds and sins is that they are entirely fearless from the punishment which will be awarded by God Almighty. They have invented at their own; different types of precepts and doctrines. Out of them, one thought is that at first, they would never be punished, and if they were punished, that would be only for a few days. The Christians had made another false doctrine crossing all others. That is to say: Jesus Christ (peace be upon him) has already been punished against all sinners and evil-doers. (Allah Almighty preserve us from such kind of thinking, because He (God Almighty) is not unjust that the guilty is saved and the innocent is punished).