نبينا محمد صلى الله عليه وسلم
Abu Hurayrah (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "By the One in Whose Hand Muhammad's soul is! There is nobody of this Ummah, be they Jewish or Christian, who hears of me and then dies without believing in what I was sent with except that he will be among the people of Hellfire."
عن أبي هريرة -رضي الله عنه- مرفوعًا: «والذي نفسُ مُحمَّد بيدِه، لا يسمعُ بي أحدٌ من هذه الأمة يهوديٌّ، ولا نصرانيٌّ، ثم يموتُ ولم يؤمن بالذي أُرْسِلتُ به، إلَّا كان مِن أصحاب النار».
شرح الحديث :
The Prophet (may Allah's peace and blessings be upon him) swears by Allah that anyone of this Ummah, meaning anyone of those who existed at his time and afterwards until the Day of Resurrection, be they Jewish or Christian, who hears of the Prophet but dies without believing in his message will be among the people of Hell. So any Jew, Christian, or otherwise who receives the Prophet's message and dies without believing in him will be among the people of Hell who will stay there permanently. The reference in this Hadīth to Jews and Christians in particular is made to include people of other faiths as well. If this is the case with the Jews and Christians, who received divine scriptures, this is more so for those who have no scripture, for everyone must accept Islam and obey its Messenger.