وَيَقُوۡلُ الَّذِيۡنَ كَفَرُوۡا لَسۡتَ مُرۡسَلاً ؕ قُلۡ كَفٰى بِاللّٰهِ شَهِيۡدًۢا بَيۡنِىۡ وَبَيۡنَكُمۡۙ وَمَنۡ عِنۡدَهٗ عِلۡمُ الۡكِتٰبِ
And the disbelievers say: ‘You are not a Messenger.’ Say: ‘Sufficient is Allah as a Witness between you and me (on my Messengership), and so also is the one who (exactly) possesses the knowledge of the (revealed) Book.