13-Surah Ar-Ra’d ( The Thunder ) 43
And those who have disbelieved say, ‘ You are not a messenger.’ Say, [O Muhammad], ‘ Sufficient is Allah as Witness between me and you, and [the witness of] whoever has knowledge of the Scripture.’
وَيَقُولُ الَّذِينَ كَفَرُوا لَسْتَ مُرْسَلًا ۚ قُلْ كَفَىٰ بِاللَّهِ شَهِيدًا بَيْنِي وَبَيْنَكُمْ وَمَنْ عِندَهُ عِلْمُ الْكِتَابِ
Quran's Tafhim ( explanation)
*62) That is "Everyone who has the knowledge of the Divinely revealed Books will bear witness to the fact that my teachings are the same that were imparted by the former prophets. "