Sunan an Nasai
3977
Sahih+2

It was narrated that Abu Hurairah said:"The Messenger of Allah [SAW] said: 'I have been commanded to fight the people until they say La ilaha illallah. If they say it, then their blood and wealth are prohibited for me, except for a right that is due, and their reckoning will be with Allah

SahihAbu Ghuddah
SahihAl-Albani