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  • English_Biography_Shefa_of_Prophet_Muhammad, page : 160

it is the word which is used at the end of supplications, and it has been said that it is amongst the Names of Allah and that its meaning is the "Guardian of Faith (Mu'min). As for the "Protector" (Muhaymin) it is said that it means Witness and the Protector.

The Prophet was given names Al Ameen, Al Mu'min, Al Muhaymin. Well before his prophethood, he was known as Al Ameen.

Allah says, "he believes in Allah and trusts the believers" (9:61). Meaning the Prophet confirms with the truth. The Prophet said, "I am the trustworthy of my Companions." This also means the Prophet is Al Mu'min (witness and protector)

"The Pure" (Al Quddus), is another of the Names of Allah, and means the One detached from all imperfections, and pure from the characteristics of creation. The Mosque in Jerusalem, (Bayt Al Maqdis) is so called, because it was there that a person can be purified of sin, and also "purified" was used in the purified valley, "For you are in Towa, the sacred valley" (20:12)", and the Pure Spirit (Gabriel) "and supported him with the Spirit of Purity (Gabriel)" (2:87).