(1) باب فَضْلُ الْجِهَادِ وَالسِّيَرِ
Narrated Ibn `Abbas:
Allah's Messenger (ﷺ) said, "There is no Hijra (i.e. migration) (from Mecca to Medina) after the Conquest (of Mecca), but Jihad and good intention remain; and if you are called (by the Muslim ruler) for fighting, go forth immediately.
Reference: Sahih al-Bukhari 2783
In-book reference: Book 56, Hadith 2
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 4, Book 52, Hadith 42