Ar Ra'd, 43 Ayah
13:43
وَيَقُولُ ٱلَّذِينَ كَفَرُواْ لَسۡتَ مُرۡسَلٗاۚ قُلۡ كَفَىٰ بِٱللَّهِ شَهِيدَۢا بَيۡنِي وَبَيۡنَكُمۡ وَمَنۡ عِندَهُۥ عِلۡمُ ٱلۡكِتَٰبِ ٤٣
Wa Yaqūlu Al-Ladhīna Kafarū Lasta Mursalāan ۚ Qul Kafá Bil-Lahi Shahīdāan Baynī Wa Baynakum Wa Man `Indahu `Ilmu Al-Kitābi
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."