What follows directly from «قَبْلَ أَنْ يُحْدِثَ مَا أَحْدَثَ»?

Narrator Criticism: Al-Mughīrah b. Saʿīd, Shaqīq and Jābir al-Juʿfī

• All earlier reports were necessarily sound for legal proof
• Once a date is known, no other narrator criticism is needed
• A chronological distinction between before and after an event
• Every later report is proved forged by this expression