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Sahih Muslim, Book 001, Number 0284: - It is narrated on the authority of Abu Huraira that the Messenger of Allah observed: By Him in Whose hand is the life of Muhammad, he who amongst the community of Jews or Christians hears about me, but does not affirm his belief in that with which I have been sent and dies in this state (of disbelief), he shall be but one of the denizens of Hell-Fire.
5:72, 73 "Surely, they have disbelieved who say: "Allah is the Messiah (Jesus), son of Maryam (Mary)." But the Messiah (Jesus) said: "O Children of Israel! Worship Allah, my Lord and your Lord." Verily, whosoever sets up partners in worship with Allah, then Allah has forbidden Paradise for him, and the Fire will be his abode. And for the Zalimun (polytheists and wrongdoers) there are no helpers."
"Surely, disbelievers are those who said: "Allah is the third of the three (in a Trinity)." But there is no ilah (god) (none who has the right to be worshipped) but One Ilâh (God-Allah). And if they cease not from what they say, verily, a painful torment will befall the disbelievers among them."
"To John ibn Rabah and the Chiefs of Aylah----I will not fight against you until I have written thus unto you. Believe, or else pay tribute. And be obedient unto the Lord and his Prophet, and the messengers of his Prophet. Honor them and clothe them with excellent vestments, not with inferior raiment. Specially clothe Zeid with excellent garments. As long as my messengers are pleased, so likewise am I. Ye know the tribute. If ye desire to have security by sea and by land, obey the Lord and his Apostle, and he will defend you from every claim, whether by Arab or foreigner, saving the claim of the Lord and his Apostle. But if ye oppose and displease them, I will not accept from you a single thing, until I have fought against you and taken captive your little ones and slain the elder.