Aya number 43 of surat Ar-Rad
بِسْمِ اللَّهِ الرَّحْمَٰنِ الرَّحِيمِ
وَيَقُولُ الَّذِينَ كَفَرُوا لَسْتَ مُرْسَلًا قُلْ كَفَىٰ بِاللَّهِ شَهِيدًا بَيْنِي وَبَيْنَكُمْ وَمَنْ عِنْدَهُ عِلْمُ الْكِتَابِ [٤٣]
Translation: English - Sahih International
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."
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