The Prophet ﷺ used his right hand for getting water for ablution and taking food, and his left hand for his evacuation and for anything repugnant.
كَانَتْ يَدُ رَسُولِ اللَّهِ ﷺ الْيُمْنَى لِطُهُورِهِ وَطَعَامِهِ وَكَانَتْ يَدُهُ الْيُسْرَى لِخَلاَئِهِ وَمَا كَانَ مِنْ أَذًى