Sahih Muslim Book - 32, Hadith - 4665

وَحَدَّثَنِى زُهَيْرُ بْنُ حَرْبٍ حَدَّثَنَا إِسْمَاعِيلُ - يَعْنِى ابْنَ عُلَيَّةَ - عَنْ عَبْدِ الْعَزِيزِ بْنِ صُهَيْبٍ عَنْ أَنَسٍ أَنَّ رَسُولَ اللَّهِ -صلى الله عليه وسلم- غَزَا خَيْبَرَ قَالَ فَصَلَّيْنَا عِنْدَهَا صَلاَةَ الْغَدَاةِ بِغَلَسٍ فَرَكِبَ نَبِىُّ اللَّهِ -صلى الله عليه وسلم- وَرَكِبَ أَبُو طَلْحَةَ وَأَنَا رَدِيفُ أَبِى طَلْحَةَ فَأَجْرَى نَبِىُّ اللَّهِ -صلى الله عليه وسلم- فِى زُقَاقِ خَيْبَرَ وَإِنَّ رُكْبَتِى لَتَمَسُّ فَخِذَ نَبِىِّ اللَّهِ -صلى الله عليه وسلم- وَانْحَسَرَ الإِزَارُ عَنْ فَخِذِ نَبِىِّ اللَّهِ -صلى الله عليه وسلم- وَإِنِّى لأَرَى بَيَاضَ فَخِذِ نَبِىِّ اللَّهِ -صلى الله عليه وسلم- فَلَمَّا دَخَلَ الْقَرْيَةَ قَالَ « اللَّهُ أَكْبَرُ خَرِبَتْ خَيْبَرُ إِنَّا إِذَا نَزَلْنَا بِسَاحَةِ قَوْمٍ فَسَاءَ صَبَاحُ الْمُنْذَرِينَ ». قَالَهَا ثَلاَثَ مِرَارٍ قَالَ وَقَدْ خَرَجَ الْقَوْمُ إِلَى أَعْمَالِهِمْ فَقَالُوا مُحَمَّدٌ - قَالَ عَبْدُ الْعَزِيزِ وَقَالَ بَعْضُ أَصْحَابِنَا - وَالْخَمِيسَ قَالَ وَأَصَبْنَاهَا عَنْوَةً.

It was narrated from Anas bin Malik that the Messenger of Allah (s.a.w) launched a campaign against Khaibar. "We prayed Fajr there when it was still dark, then the Prophet of Allah (s.a.w) rode and Abu Talhah rode, and I was seated behind Abu Talhah (on his mount). The Prophet (s.a.w) let his mount run through the narrow streets of Khaibar, and my knee was touching the thigh of the Prophet of Allah (s.a.w). The Izar slipped from the thigh of the Prophet of Allah (s.a.w), and I could see the whiteness of the thigh of the Prophet of Allah (s.a.w). When he entered the town, he said: 'Allahu-Akbar! Khaibar is destroyed! Then, when we descend in their courtyard (i.e. near to them), evil will be the morning for those who had been warned!' He said it three times. The people had come out to their work and they said: 'Muhammad!'" - (One of the narrators) 'Abdul-'Aziz said: "Some of our companions said: 'And the army!"'- He said: "And we seized Khaibar by force."