The Prophet ﷺ mentioned to us that his mission was a sign of the imminence of the Hour and that it is the first of the minor signs of it.
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Sahl ibn Sa`dرضي الله عنهnarrated, "I saw the Messenger ﷺ gesturing with his two fingers like this, the middle finger and the one that is next to the thumb, [saying], "`I have been sent when the Hour is like these two.'(1)"
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And He ﷺ said: "I have been sent at the beginning of the Hour"(2)
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Al-Qurtubi said, "The first of [the signs] was the Prophet ﷺ because he was the Prophet to the end of time; he has been sent and there will be no other Prophet between him and the Day of Resurrection."(3)
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Footnotes(1) Narra Al-Bukhaari.; also Narrated by Muslim. from Anas (2) Narrate by Al-Haakim in Al-Kuna, Al-Albaani said it as Saheeh (Al-Silsitah Al-Saheehah, Hadeeth no. 808) (3) Al-Qurtubi: Al-Tadhkirah, 1/710
SourceBook:the end of the world signs of hour major and minor by Dr. Muhammad al-Areefi