Sunan an-Nasa'i 4097
سنن النسائي#4097SahihIt 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
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahShadh
Al-AlbaniShadh
Zubair Ali ZaiIsnaad Sahih
In-book reference: 37:132