The Book on Government
وَحَدَّثَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ نُمَيْرٍ، حَدَّثَنَا أَبِي، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ حَبِيبِ بْنِ أَبِي، ثَابِتٍ عَنْ عَبْدِ اللَّهِ بْنِ عَبْدِ الرَّحْمَنِ بْنِ أَبِي حُسَيْنٍ، عَنْ عَطَاءٍ، عَنْ عَائِشَةَ، قَالَتْ سُئِلَ رَسُولُ اللَّهِ صلى الله عليه وسلم عَنِ الْهِجْرَةِ فَقَالَ " لاَ هِجْرَةَ بَعْدَ الْفَتْحِ وَلَكِنْ جِهَادٌ وَنِيَّةٌ وَإِذَا اسْتُنْفِرْتُمْ فَانْفِرُوا " .A'isha reported that the Messenger of Allah (ﷺ) was asked about migration, whereupon he said:There is no migration after the Conquest (of Mecca), but Jihad and sincere intention. When you are asked to set out (for the cause of Islam), you should set out
From Sahih Muslim, whose reports the scholars accept as authentic.