From Sahih Bukhari (Hadith 2783):
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: Bukhari 2783