If a slave is appointed over you and he conducts your affairs according to the Book of Allah, you should listen to him and obeey (his orders).
أَنَّهَا سَمِعَتِ النَّبِيَّ ﷺ يَخْطُبُ فِي حَجَّةِ الْوَدَاعِ وَهُوَ يَقُولُ وَلَوِ اسْتُعْمِلَ عَلَيْكُمْ عَبْدٌ يَقُودُكُمْ بِكِتَابِ اللَّهِ فَاسْمَعُوا لَهُ وَأَطِيعُوا