When a slave fulfils obligation of Allah and obligation of his master, he has two rewards for him. I narrated this to Ka'b, and Ka'b said: (Such a slave) has no accountability, nor has a poor believer.
قَالَ رَسُولُ اللَّهِ ﷺ إِذَا أَدَّى الْعَبْدُ حَقَّ اللَّهِ وَحَقَّ مَوَالِيهِ كَانَ لَهُ أَجْرَانِ قَالَ فَحَدَّثْتُهَا كَعْبًا فَقَالَ كَعْبٌ لَيْسَ عَلَيْهِ حِسَابٌ وَلاَ عَلَى مُؤْمِنٍ مُزْهِدٍ
[Machine] The Messenger of Allah ﷺ said, "When the servant fulfills the rights of Allah and the rights of His slaves, he will have two rewards." I narrated this to Ka'b, and he said, "He will not be held accountable, nor will a believer who is detached from worldly desires."
قَالَ رَسُولُ اللهِ ﷺ إِذَا أَدَّى الْعَبْدُ حَقَّ اللهِ وَحَقَّ مَوَالِيهِ؛ كَانَ لَهُ أَجْرَانِ قَالَ فَحَدَّثْتُهُ كَعْبًا فَقَالَ لَيْسَ عَلَيْهِ حِسَابٌ وَلَا عَلَى مُؤْمِنٍ مُزْهِدٍ