فَإِن كُنتَ فِي شَكٍّ مِّمَّا أَنزَلْنَا إِلَيْكَ فَاسْأَلِ الَّذِينَ يَقْرَوُونَ الْكِتَابَ مِن قَبْلِكَ لَقَدْ جَاءكَ الْحَقُّ مِن رَّبِّكَ فَلَ تَكُونَنَّ مِنَ الْمُمْتَرِينَ وَلَا تَكُونَنَّ مِنَ الَّذِينَ كَذَّبُواْ بِأيَاتِ اللّهِ فَتَكُونَ مِنَ الْخَاسِرِينَ So if you are in doubt concerning that which We have revealed unto you, then ask those who are reading the Book before you. Verily, the truth has come to you from your Lord. So be not of those who doubt (it).And be not one of those who belie the Ayat of Allah, for then you shall be one of the losers.Allah said:الَّذِينَ يَتَّبِعُونَ الرَّسُولَ النَّبِىَّ الاُمِّىَّ الَّذِى يَجِدُونَهُ مَكْتُوبًا عِندَهُمْ فِى التَّوْرَاةِ وَالاِنجِيلِThose who follow the Messenger, the Prophet who can neither read nor write whom they find written of with them in the Tawrah and the Injil. (7:157)They are as certain of this as they are about who their children are, yet they hide it and distort it. They did not believe in it despite its clear evidence.Therefore Allah said: