The Prophet ﷺ said, "If a slave serves his Saiyid (i.e. master) sincerely and worships his Lord (Allah) perfectly, he will get a double reward."
عَنِ النَّبِيِّ ﷺ قَالَ إِذَا نَصَحَ الْعَبْدُ سَيِّدَهُ وَأَحْسَنَ عِبَادَةَ رَبِّهِ كَانَ لَهُ أَجْرُهُ مَرَّتَيْنِ