A slave is a guardian of the property of his master

Narrated Abdullah bin 'Umar:

I heard Allah's Apostle saying, "Everyone of you is a guardian, and responsible for what is in his custody. The ruler is a guardian of his subjects and responsible for them;
a husband is a guardian of his family and is responsible for it;
a lady is a guardian of her husband's house and is responsible for it, and a servant is a guardian of his master's property and is responsible for it." I heard that from Allah's Apostle and I think that the Prophet also said, "A man is a guardian of is father's property and is responsible for it, so all of you are guardians and responsible for your wards and things under your care."

حَدَّثَنَا أَبُو الْيَمَانِ، أَخْبَرَنَا شُعَيْبٌ، عَنِ الزُّهْرِيِّ، قَالَ أَخْبَرَنِي سَالِمُ بْنُ عَبْدِ اللَّهِ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ ـ رضى الله عنهما ـ أَنَّهُ سَمِعَ رَسُولَ اللَّهِ ﷺ يَقُولُ " كُلُّكُمْ رَاعٍ وَمَسْئُولٌ عَنْ رَعِيَّتِهِ، فَالإِمَامُ رَاعٍ، وَهْوَ مَسْئُولٌ عَنْ رَعِيَّتِهِ، وَالرَّجُلُ فِي أَهْلِهِ رَاعٍ، وَهْوَ مَسْئُولٌ عَنْ رَعِيَّتِهِ، وَالْمَرْأَةُ فِي بَيْتِ زَوْجِهَا رَاعِيَةٌ وَهْىَ مَسْئُولَةٌ عَنْ رَعِيَّتِهَا، وَالْخَادِمُ فِي مَالِ سَيِّدِهِ رَاعٍ، وَهْوَ مَسْئُولٌ عَنْ رَعِيَّتِهِ ". قَالَ فَسَمِعْتُ هَؤُلاَءِ مِنْ رَسُولِ اللَّهِ ﷺ وَأَحْسِبُ النَّبِيَّ ﷺ قَالَ " وَالرَّجُلُ فِي مَالِ أَبِيهِ رَاعٍ، وَهْوَ مَسْئُولٌ عَنْ رَعِيَّتِهِ، فَكُلُّكُمْ رَاعٍ، وَكُلُّكُمْ مَسْئُولٌ عَنْ رَعِيَّتِهِ ".