Narrated ['Aishah (RA)]:

When Allah's Messenger (ﷺ) intended to go on a journey, he cast lots among his wives. Then, he would take with him the one who was chosen by the lot. [Agreed upon].

وَعَنْهَا قَالَتْ : { كَانَ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-إِذَا أَرَادَ سَفَرًا أَقْرَعَ بَيْنَ نِسَائِهِ , فَأَيَّتُهُنَّ خَرَجَ سَهْمُهَا , خَرَجَ بِهَا } مُتَّفَقٌ عَلَيْه ِ [1]‏ .‏