سُنَنُ النَّسَائِيِّ
Sunan an-Nasa’i 4099
The Book of Fighting [The Prohibition of Bloodshed]
The One Who Unsheathes His Sword and Starts to Strike the People With it
أَخْبَرَنَا أَبُو دَاوُدَ، قَالَ حَدَّثَنَا أَبُو عَاصِمٍ، عَنِ ابْنِ جُرَيْجٍ، عَنِ ابْنِ طَاوُسٍ، عَنْ أَبِيهِ، عَنِ ابْنِ الزُّبَيْرِ، قَالَ مَنْ رَفَعَ السِّلاَحَ ثُمَّ وَضَعَهُ فَدَمُهُ هَدَرٌ .
It was narrated that Ibn Az-Zubair said: "Whoever wields a weapon and starts to strike (the people) with it, it is permissible to shed his blood."
Sunan an-Nasa'i, 4099Sahih (Darussalam)