الرّعد — Ar-Ra'd Ayat 43
وَيَقُوْلُ الَّذِيْنَ كَفَرُوْا لَسْتَ مُرْسَلًا ۗ قُلْ كَفٰى بِاللّٰهِ شَهِيْدًاۢ بَيْنِيْ وَبَيْنَكُمْۙ وَمَنْ عِنْدَهٗ عِلْمُ الْكِتٰبِ ࣖ
Wa yaqūlul-lażīna kafarū lasta mursalā(n), qul kafā billāhi syahīdam bainī wa bainakum, wa man ‘indahū ‘ilmul-kitāb(i).
"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.""