عَنِ ابْنِ عَبَّاسٍ: أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قُبِضَ عَنْ تِسْعِ نِسْوَةٍ وَكَانَ يقسم مِنْهُنَّ لثمان

She said that when God’s Messenger intended to go on a journey he cast lots among his wives and the one who was chosen by lot went on it with him. (Bukhari and Muslim.)