(20) باب الْمُبَايَعَةِ بَعْدَ فَتْحِ مَكَّةَ عَلَى الإِسْلاَمِ وَالْجِهَادِ وَالْخَيْرِ وَبَيَانِ مَعْنَى: «لاَ هِجْرَةَ بَعْدَ الْفَتْحِ»
It has been narrated on the authority of Ibn 'Abbas that the Messenger of Allah (ﷺ) 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.
Reference: Sahih Muslim 1353 c
In-book reference: Book 33, Hadith 125
USC-MSA web (English) reference(deprecated numbering scheme): Book 20, Hadith 4597