A’ishah wife of the Prophet (ﷺ) reported “When the Messenger of Allah(ﷺ) intended to go on a journey he cast lots amongst his wives and the one who was chosen by lot went on it with him. He divided his time, day and night (equally) for each of his wives except that Saudah daughter of Zam’ah gave her day to A’ishah.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا أَحْمَدُ بْنُ عَمْرِو بْنِ السَّرْحِ، أَخْبَرَنَا ابْنُ وَهْبٍ، عَنْ يُونُسَ، عَنِ ابْنِ شِهَابٍ، أَنَّ عُرْوَةَ بْنَ الزُّبَيْرِ، حَدَّثَهُ أَنَّ عَائِشَةَ زَوْجَ النَّبِيِّ صلى الله عليه وسلم قَالَتْ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم إِذَا أَرَادَ سَفَرًا أَقْرَعَ بَيْنَ نِسَائِهِ فَأَيَّتُهُنَّ خَرَجَ سَهْمُهَا خَرَجَ بِهَا مَعَهُ وَكَانَ يَقْسِمُ لِكُلِّ امْرَأَةٍ مِنْهُنَّ يَوْمَهَا وَلَيْلَتَهَا غَيْرَ أَنَّ سَوْدَةَ بِنْتَ زَمْعَةَ وَهَبَتْ يَوْمَهَا لِعَائِشَةَ .
sunnah.com