that the Messenger of Allah said: "Whoever has two wives and favors one of them over the other, he will come on the Day of Resurrection with one of his sides leaning."  

قَالَ رَسُولُ اللَّهِ ﷺ مَنْ كَانَتْ لَهُ امْرَأَتَانِ يَمِيلُ مَعَ إِحْدَاهُمَا عَلَى الأُخْرَى جَاءَ يَوْمَ الْقِيَامَةِ وَأَحَدُ شِقَّيْهِ سَاقِطٌ  

that whenever the Messenger of Allah was to travel, he would cast lots among his wives.  

أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ إِذَا سَافَرَ أَقْرَعَ بَيْنَ نِسَائِهِ  

"The Messenger of Allah used to divide his time equally among his wives, then he would say 'O Allah, this is what I am doing with regard to that which is within my control, so do not hold me accountable for that which is under Your control and is beyond my control.'"  

كَانَ رَسُولُ اللَّهِ ﷺ يَقْسِمُ بَيْنَ نِسَائِهِ فَيَعْدِلُ ثُمَّ يَقُولُ اللَّهُمَّ هَذَا فِعْلِي فِيمَا أَمْلِكُ فَلاَ تَلُمْنِي فِيمَا تَمْلِكُ وَلاَ أَمْلِكُ