Sahih Muslim Book - 32, Hadith - 4666

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِى شَيْبَةَ حَدَّثَنَا عَفَّانُ حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ حَدَّثَنَا ثَابِتٌ عَنْ أَنَسٍ قَالَ كُنْتُ رِدْفَ أَبِى طَلْحَةَ يَوْمَ خَيْبَرَ وَقَدَمِى تَمَسُّ قَدَمَ رَسُولِ اللَّهِ -صلى الله عليه وسلم- قَالَ فَأَتَيْنَاهُمْ حِينَ بَزَغَتِ الشَّمْسُ وَقَدْ أَخْرَجُوا مَوَاشِيَهُمْ وَخَرَجُوا بِفُئُوسِهِمْ وَمَكَاتِلِهِمْ وَمُرُورِهِمْ فَقَالُوا مُحَمَّدٌ وَالْخَمِيسَ. قَالَ رَسُولُ اللَّهِ -صلى الله عليه وسلم- « خَرِبَتْ خَيْبَرُ إِنَّا إِذَا نَزَلْنَا بِسَاحَةِ قَوْمٍ فَسَاءَ صَبَاحُ الْمُنْذَرِينَ ». قَالَ فَهَزَمَهُمُ اللَّهُ عَزَّ وَجَلَّ.

It was narrated that Anas said: "I was riding behind Abu Talhah on the day of (the battle of) Khaibar, and my foot was touching the foot of the Messenger of Allah (s.a.w). We came to them when the sun had risen and they had brought out their flocks and had come out with their axes, large baskets and shovels. They said: 'Muhammad and the army!' The Messenger of Allah (s.a.w) said: '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!' And Allah defeated them."