Islam has placed the testimony of monotheism “There is no deity except Allah” in the highest of ranks. It is the first obligatory act of a Muslim, so whoever wants to enter Islam must believe it and utter it. And whoever says it with conviction, seeking Allah's face through it, it will be the reason for his deliverance from the Fire, as the Prophet, may God’s prayers and peace be upon him, said: “Allah has made the fire of Hell unlawful for him who affirms that none has the right to be worshipped but Allah.” (Bukhari 415)