Even for such definite signs God reserves bada’. God may change those of the definite Wills that are not categorized as His Sunan or His Promises. For instance, according to Twelvers, before the reappearance of the Mahdi, al-Sufyani would certainly rise. This is a definite Will, but it is not categorized as a promise. It is just an insisted future event meaning that it is unlikely that God cancels His Permission for the occurrence of this event, though it is still possible. According to the following tradition, God may make bada’ even in such insisted news. Dawud Ibn al-Qasim al-Ja'fari narrated:
