Sahih Muslim · Hadith 4936
The Book on Government - كتاب الإمارة
حدثنا يحيى بن يحيى، وإسحاق بن إبراهيم، قالا أخبرنا جرير، عن منصور، عن مجاهد، عن طاوس، عن ابن عباس، قال قال رسول الله صلى الله عليه وسلم يوم الفتح فتح مكة " لا هجرة ولكن جهاد ونية وإذا استنفرتم فانفروا " .
It has been narrated on the authority of Ibn 'Abbas that the Messenger of Allah (may peace be upon him) said on the day of the Conquest of Mecca: There is no Hijra now, but (only) Jihad (fighting for the cause of Islam) and sincerity of purpose (have great reward) ; when you are asked to set out (on an expedition undertaken for the cause of Islam) you should (readily) do so.
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).