Abu Hurayra reported that the Messenger of Allah, may Allah bless him and grant him peace, said, "When the Muslim slave performs the due of Allah and the due of his master, he will have two rewards."  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ الْعَبْدُ الْمُسْلِمُ إِذَا أَدَّى حَقَّ اللهِ وَحَقَّ سَيِّدِهِ لَهُ أَجْرَانِ وَالَّذِي نَفْسُ أَبِي هُرَيْرَةَ بِيَدِهِ لَوْلاَ الْجِهَادُ فِي سَبِيلِ اللهِ وَالْحَجُّ وَبِرُّ أُمِّي لَأَحْبَبْتُ أَنْ أَمُوتَ مَمْلُوكًا