Imam Sadiq (AS) has also said: “Surely a believer is more resistant than the blocks of iron, for the blocks of iron are changed when put into fire, whereas a believer’s faith never changes even if he is killed and then become alive and is killed again.”
Miongoni mwao ni 'As-habul Kahf (Wenzi wa Pangoni), ambao Mwenyeezi Mungu aliwalaza (kama wamekufa) kwa muda wa miaka 309. kisha Akawarudishia ufahamu wa nafsini wakati ambao watu walikuwa hawaamini ufufuo wa wafu, ili Azibatilishe fikra zao na awaonyeshe Nguvu Zake, waweze kuamini kuwa ufufuo ni Kweli (uko).