قُلْ كَفَىٰ بِاللَّهِ شَهِيدًا بَيْنِي وَبَيْنَكُمْ وَمَنْ عِنْدَهُ عِلْمُ الْكِتَابِ
Say: Allah is sufficient as witness between me and you, and whoever has knowledge of the Scripture (Qur’an 13:43, relevant excerpt).
The response calls attention to testimony, earlier knowledge of prophethood and the possibility of revelation. قُلْ إِنَّمَا أَنَا بَشَرٌ مِثْلُكُمْ يُوحَىٰ إِلَيَّ
Say: I am only a human like you, to whom revelation comes (Qur’an 18:110, opening clause).
Acknowledging a prophet’s humanity does not cancel prophethood. The claim concerns a divine communication, not the absence of a human body.