And if We had made it a Quran in a foreign tongue, they surely would have said, Why not its verses have been made clear? What, a book in foreign tongue and the Prophet Arabian. Say you, 'that is a guidance and a cure for the believers.' And those who believe not, in their ears is a plug and to them it is a blindness. They are like those. Who are called from a far off place.[41:44]
It is narrated on the authority of 'Uthman that the Messenger of Allah (may peace be upon him) said. He who died knowing (fully well) that there is no god but Allah entered Paradise.