Mu'jizah is a miraculous demonstration by the Ambiyaa (AS). Such supernatural feats are exhibited by the permission of Allah
and they serve to establish the authenticity of the Ambiyaa (AS).
Mu'jizah was not demonstrated by the Ambiyaa (AS) at will. They had no choice in the matter. Mu'jizah is in fact the creation of Allah
manifested via the agency of the Ambiyaa (AS).
Rejection of Mu'jizah is kufr.