What did the Prophet Muhammad (saw) say about those who swear an oath on a religion other than Islam?
 It is narrated on the authority of Thabit b. Dahhak that the Apostle of Allah (may peace be upon him) observed:                      He who took deliberately a false oath on a religion other than Islam would become that which he had professed. And he who killed himself with anything Allah would torment him with that in the Fire of Hell.