The Book of Fighting [The Prohibition of Bloodshed]
37/26. Chapter:
The One Who Unsheathes His Sword and Starts to Strike the People With it
Sunan an-Nasai
أَخْبَرَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، قَالَ أَنْبَأَنَا الْفَضْلُ بْنُ مُوسَى، قَالَ حَدَّثَنَا مَعْمَرٌ، عَنِ ابْنِ طَاوُسٍ، عَنْ أَبِيهِ، عَنِ ابْنِ الزُّبَيْرِ، عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم قَالَ " مَنْ شَهَرَ سَيْفَهُ ثُمَّ وَضَعَهُ فَدَمُهُ هَدَرٌ " .
It was narrated from Ibn Az-Zubair that: The Messenger of Allah [SAW] said: "Whoever unsheathes his sword and starts to strike the people with it, it is permissible to shed his blood."
Reference : Sunan an-Nasa'i 4097In-book reference : Book 37, Hadith 132English translation : Vol. 5, Book 37, Hadith 4102