Sahih Muslim Book - 44, Hadith - 6222

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ ، حَدَّثَنَا يَعْقُوبُ ، يَعْنِي ابْنَ عَبْدِ الرَّحْمَنِ الْقَارِيَّ ، عَنْ سُهَيْلٍ ، عَنْ أَبِيهِ ، عَنْ أَبِي هُرَيْرَةَ ، أَنَّ رَسُولَ اللهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ، قَالَ يَوْمَ خَيْبَرَ : لأُعْطِيَنَّ هَذِهِ الرَّايَةَ رَجُلاً يُحِبُّ اللَّهَ وَرَسُولَهُ ، يَفْتَحُ اللَّهُ عَلَى يَدَيْهِ قَالَ عُمَرُ بْنُ الْخَطَّابِ : مَا أَحْبَبْتُ الإِمَارَةَ إِلاَّ يَوْمَئِذٍ ، قَالَ فَتَسَاوَرْتُ لَهَا رَجَاءَ أَنْ أُدْعَى لَهَا ، قَالَ فَدَعَا رَسُولُ اللهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَلِيَّ بْنَ أَبِي طَالِبٍ ، فَأَعْطَاهُ إِيَّاهَا ، وَقَالَ : امْشِ ، وَلاَ تَلْتَفِتْ ، حَتَّى يَفْتَحَ اللَّهُ عَلَيْكَ قَالَ فَسَارَ عَلِيٌّ شَيْئًا ثُمَّ وَقَفَ وَلَمْ يَلْتَفِتْ ، فَصَرَخَ : يَا رَسُولَ اللهِ ، عَلَى مَاذَا أُقَاتِلُ النَّاسَ ؟ قَالَ : قَاتِلْهُمْ حَتَّى يَشْهَدُوا أَنْ لاَ إِلَهَ إِلاَّ اللَّهُ وَأَنَّ مُحَمَّدًا رَسُولُ اللهِ ، فَإِذَا فَعَلُوا ذَلِكَ فَقَدْ مَنَعُوا مِنْكَ دِمَاءَهُمْ وَأَمْوَالَهُمْ ، إِلاَّ بِحَقِّهَا وَحِسَابُهُمْ عَلَى اللَّهِ.

It was narrated from Abu Hurairah that the Messenger of Allah (s.a.w) said on the Day of Khaibar: "I shall give this flag to a man who loves Allah and His Messenger, and Allah will grant victory at his hands." 'Umar bin Al-Khattab said: "I never desired leadership except on that day." He said: "I came before him in the hope that I might be called to it, but the Messenger of Allah (s.a.w) called 'Ali bin Abi Talib. He gave it to him and said: 'March, and do not turn around until Allah grants you victory."' 'Ali walked a little way, then he stopped, but he did not turn around, and he shouted: "O Messenger of Allah, on what basis should I fight the people?" He said: "Fight them until they bear witness that none has the right to we worshiped but Allah and that Muhammad is the Messenger of Allah. If they do that, then they have protected from you their blood and their wealth, except for a right that is due, and their reckoning will be with Allah."