▁al - K a ‘ bi ▁( d . 3 1 9 ▁A . H . ▁/ ▁ 9 3 1 ▁CE ), ▁they ▁were ▁the ▁biggest ▁and ▁most ▁important ▁section ▁of ▁the ▁follow ers ▁of ▁Ja ' far ▁al - S adi q . ▁To ▁support ▁his ▁claims , ▁Abd ul lah ▁al - A ft ah ▁seems ▁to ▁have ▁claimed ▁a ▁ 2 nd ▁N ass ▁from ▁his ▁father ▁( follow ing ▁Is m ā ' ī l ' s ▁dem ise ) ▁and ▁his ▁ad her ents ▁c ited ▁a ▁supposed ▁Had ith ▁from ▁Ja ' far ▁al - S adi q ▁to ▁the ▁effect ▁that ▁the ▁Im am ate ▁must ▁be ▁transm itted ▁through ▁the ▁el dest ▁son ▁of ▁the ▁Im am . ▁However , ▁when ▁Abd ul lah ▁al - A ft ah ▁died ▁child less ▁about ▁ 7 0 ▁days ▁after ▁the ▁death ▁of ▁his ▁father , ▁the ▁bulk ▁of ▁his ▁supp or ters ▁went ▁over ▁to ▁his ▁brother ▁Mus a ▁al - K ad him . ▁Other ▁F ath ites ▁considered ▁Abd ul lah ▁al - A ft ah ▁the ▁ 7 th ▁Im am ▁and ▁Mus a ▁al - K ad him ▁the ▁ 8 th ▁Im am , ▁while ▁others ▁believed ▁the ▁Im am ate ▁came ▁to ▁an ▁end ▁when ▁Abd ul lah ▁al - A ft ah ▁died . ▁Another ▁group ▁invent ed ▁a ▁son ▁for ▁Abd ul lah ▁al - A ft ah , ▁called ▁Muhammad ▁ibn ▁Abd ul lah ▁al -