Sahih Muslim Book - 32, Hadith - 4680

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِى شَيْبَةَ حَدَّثَنَا يَزِيدُ بْنُ هَارُونَ أَخْبَرَنَا حَمَّادُ بْنُ سَلَمَةَ عَنْ ثَابِتٍ عَنْ أَنَسٍ أَنَّ أُمَّ سُلَيْمٍ اتَّخَذَتْ يَوْمَ حُنَيْنٍ خِنْجَرًا فَكَانَ مَعَهَا فَرَآهَا أَبُو طَلْحَةَ فَقَالَ يَا رَسُولَ اللَّهِ هَذِهِ أُمُّ سُلَيْمٍ مَعَهَا خَنْجَرٌ فَقَالَ لَهَا رَسُولُ اللَّهِ -صلى الله عليه وسلم- « مَا هَذَا الْخَنْجَرُ ». قَالَتِ اتَّخَذْتُهُ إِنْ دَنَا مِنِّى أَحَدٌ مِنَ الْمُشْرِكِينَ بَقَرْتُ بِهِ بَطْنَهُ. فَجَعَلَ رَسُولُ اللَّهِ -صلى الله عليه وسلم- يَضْحَكُ قَالَتْ يَا رَسُولَ اللَّهِ اقْتُلْ مَنْ بَعْدَنَا مِنَ الطُّلَقَاءِ انْهَزَمُوا بِكَ. فَقَالَ رَسُولُ اللَّهِ -صلى الله عليه وسلم- « يَا أُمَّ سُلَيْمٍ إِنَّ اللَّهَ قَدْ كَفَى وَأَحْسَنَ ».

It was narrated from Anas that on the day of (the battle of) Hunain, Umm Sulaim kept a dagger with her. Abu Talhah saw her and said: "O Messenger of Allah, Umm Sulaim has a dagger with her." The Messenger of Allah (s.a.w) said to her: "What is this dagger (for)?" She said: "I am keeping it so that if any of the idolaters come near me, I will rip his belly open with it." The Messenger of Allah (s.a.w) smiled and she said: "O Messenger of Allah, kill all those, other than us, whom you set free, because they are the ones who deserted you." The Messenger of Allah (s.a.w) said: "O Umm Sulaim, Allah is sufficient and He has been kind to us."