Sunan an Nasai
2875
Sahih+2

It was narrated that Ibn Abbas said:"The Messenger of Allah said on the day of the conquest of Makkah: 'Allah, the Might and Sublime, has made this land sacred, and it was not permissible to fight therein for anyone before me. It was permitted for me for a few hours of a day, and it is sacred by the decree of Allah, the Might and Sublime

SahihAbu Ghuddah
SahihAl-Albani