Say, “”O owners of the book! you are on nothing till you establish the Torah and the Injeel and that which is sent down to you from your Fosterer.”” And that which is sent down to you from your Fosterer will definitely increase rebellion and infidelity in many of them, therefore, do not grieve over a people who are infidels.
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If Jews and Christians establish the original Torah and Injeel, they will have to accept Muhammed (PBH) as the messenger of Allah (SWT) because this is mentioned in their books 7:157, 61:6.